Case Study 2: The Tea Party (2009–2014) and the Sunrise Movement (2017–2024) — Two Insurgencies, One Institutional Logic

What this case is about

This case study pairs two American social movements that emerged within roughly a decade of each other, on opposite sides of the political spectrum, in response to large-scale external shocks. Both were grassroots in their initial organization. Both moved a major political party substantively. Both seeded a faction inside their party. Both have substantial institutional legacies even though neither operates today under its original name.

The Tea Party movement of 2009–2014 emerged from the right, in the immediate aftermath of the 2008 financial crisis and the early Obama administration. The Sunrise Movement (2017–2024) emerged from the left, in response to the 2016 Trump election and the worsening evidence on climate change.

Their substantive politics could hardly be more different. Their institutional dynamics are recognizably the same.

This is the analytical claim of the chapter, walked through in detail: movements across the political spectrum exhibit similar institutional dynamics. The partisan valence is secondary to the organizational form.

Founding moments and seeding shocks

The Tea Party

The Tea Party's founding moment is conventionally located on February 19, 2009, when CNBC commentator Rick Santelli, broadcasting live from the Chicago Mercantile Exchange, delivered a four-minute rant against the Obama administration's plan to subsidize troubled mortgages. "President Obama, are you listening?" Santelli demanded. "How about this, Mr. President and the new administration? Why don't you put up a website to have people vote on the Internet as a referendum to see if we want to subsidize the losers' mortgages?" He suggested a "Chicago Tea Party" in July; the clip went viral; within weeks, "Tea Party" rallies were happening across the country.

The seeding shocks behind Santelli's moment were substantial. The financial crisis of 2007–08 had wiped out trillions in household wealth. The Bush administration's TARP bailout (October 2008) had rescued large banks with public funds. The Obama administration's American Recovery and Reinvestment Act (February 2009, the day before Santelli's rant) added $787 billion in stimulus spending. The proposed Affordable Care Act, which would dominate political debate for the next year, was beginning to take shape. From the perspective of Tea Party participants — who, Theda Skocpol and Vanessa Williamson's 2012 study documented, were primarily older, white, middle-class, and Republican — Washington was bailing out big banks, then big borrowers, then expanding the welfare state, all on the public dime. The grievance was real and motivated.

The Sunrise Movement

Sunrise Movement was founded in April 2017 by a group of young climate activists, including Varshini Prakash and Sara Blazevic. The founding members had been involved in the Fossil Fuel Divestment Campaign on college campuses (2010–) and 350.org's earlier organizing. They believed the existing climate movement was insufficient — too cautious, too polite, too willing to accept incremental policy. They aimed at a "Green New Deal": a comprehensive federal climate-and-jobs program at the scale of the New Deal of the 1930s.

The seeding shocks: the November 2016 election of Donald Trump and the United States' subsequent withdrawal from the Paris Climate Agreement, the worsening scientific evidence on warming (the IPCC's 1.5°C special report would land in October 2018), and the perception that the existing environmental movement had been politically defeated through 2017.

Sunrise's founding moment in the public eye was November 13, 2018: a sit-in at then-Speaker-designate Nancy Pelosi's office in Washington, with about 200 young activists, joined by newly elected Representative Alexandria Ocasio-Cortez. The action was widely covered; the Green New Deal, until then a marginal policy idea, became a central topic of Democratic primary debate by 2019.

The pattern

Both movements emerged from external shocks (financial crisis; Trump election plus climate evidence), found a precipitating moment (Santelli; the Pelosi sit-in), and rapidly built mass participation around a coherent grievance.

Organizational form

The Tea Party

The Tea Party was not a single organization but a coalition of:

• National-level professionalized infrastructure: FreedomWorks (descended from a 1980s Koch-network organization), Americans for Prosperity (Koch-network), Tea Party Patriots, the Tea Party Express. These provided fundraising, communications, and coordination for the movement.
• Hundreds of local and state Tea Party organizations, with no national affiliation. Skocpol and Williamson's research documented that the local groups had high participation, met regularly, conducted serious internal political education, and were substantially independent of the national organizations. This was not, in their assessment, primarily an "AstroTurf" phenomenon (despite some progressive characterization); it was a genuine grassroots movement that had a layer of professionalized national infrastructure on top of it.
• Conservative media ecosystem: Fox News and conservative talk radio provided massive amplification. Glenn Beck's coverage in 2009–10 was particularly influential.

The Sunrise Movement

Sunrise's organization combined:

• A national hub: a paid staff (peaking around 50 in the late 2010s), a national strategic team, and the Sunrise Movement Education Fund (501(c)(3)) and Sunrise PAC.
• A network of local chapters, organized around a "hub" model, with hundreds of hubs in cities and on college campuses.
• A youth focus: Sunrise was deliberately a youth-led movement, with most participants under 30 and a substantial high-school and college presence.
• Allied progressive media: outlets like The Intercept, In These Times, parts of Democracy Now, and the social-media presence of Ocasio-Cortez and others amplified Sunrise's framing.

The pattern

Both movements had a hub-and-spoke structure: a national professional layer that provided strategy, fundraising, and communications, on top of a much larger volunteer base of local organizations. This is the standard form of effective contemporary American social movements; it is the form that the civil-rights coalition had in the 1960s and that the Religious Right had in the 1980s.

Strategic posture

The Tea Party

The Tea Party's strategic emphasis was electoral. From its earliest months, the movement focused on Republican primary challenges to incumbent Republicans deemed insufficiently conservative. The 2010 cycle produced a series of high-profile primary upsets:

• Marco Rubio in the Florida Senate race (defeating sitting governor Charlie Crist, who left the Republican Party as a result).
• Mike Lee in the Utah Senate race (defeating three-term incumbent Bob Bennett).
• Rand Paul in the Kentucky Senate race (defeating the establishment candidate).
• Several others (Sharron Angle in Nevada, Christine O'Donnell in Delaware), some of whom won primaries but lost general elections.

The 2010 Republican wave (a 63-seat House gain, the largest since 1948) is conventionally attributed in significant part to Tea Party energy — both in mobilizing Republican voters and in pulling some swing voters skeptical of the Obama administration's economic policy. The Tea Party's capacity to threaten primary challenges sustained discipline on Republican members of Congress for years afterward.

Sunrise

Sunrise's strategic emphasis combined direct action with electoral primary challenges. The Pelosi sit-in (November 2018) was the visible direct-action moment; Sunrise also coordinated school strikes with the broader Fridays for Future movement. The electoral component included endorsements of progressive Democratic primary challengers, most prominently Cori Bush (defeating incumbent William Lacy Clay in Missouri's 1st District in 2020) and several state-level candidates. Sunrise also pressured incumbent Democrats — including Joe Biden during the 2019–20 primary — to adopt stronger climate platforms.

The pattern

Both movements deployed a similar mix: visible disruption to capture attention, primary electoral pressure to discipline party members, and policy advocacy to shift platforms. Both succeeded in using primary challenges to alter the calculations of inside-system politicians. Both used media and protest tactics to keep their issue on the public agenda.

Effectiveness and legacy

The Tea Party

The Tea Party substantially shaped the Republican Party's policy posture in the 2010s. Specific consequences:

• The 2011 debt-ceiling crisis: Tea Party Republicans insisted on substantial spending cuts as a condition of raising the debt ceiling, producing the Budget Control Act of 2011 with its sequestration mechanism.
• The 2013 government shutdown: Tea Party–aligned Republicans, led by Senator Ted Cruz, forced a shutdown over Affordable Care Act funding.
• The Freedom Caucus: founded January 2015 by nine Republican members including Mick Mulvaney, Jim Jordan, and Raúl Labrador, it became the institutional successor to Tea Party legislative pressure. As of 2026, the Freedom Caucus remains a central force in Republican congressional politics.
• Speaker Boehner's 2015 resignation: largely attributable to Freedom Caucus pressure.

The Tea Party as such largely dissolved by 2014–15. Many of its activists migrated into the MAGA coalition starting in 2015–16. Its institutional residue is the Freedom Caucus and a generation of conservative activists who have remained politically engaged.

Sunrise Movement

Sunrise's legislative legacy is the climate provisions of the Inflation Reduction Act of 2022 — approximately $370 billion in federal climate investments, the largest in American history. The path from the November 2018 Pelosi sit-in to the August 2022 IRA passage runs through the 2019 Green New Deal resolution (introduced by Ocasio-Cortez and Senator Ed Markey, never receiving a vote), the 2020 Biden campaign's adoption of substantial climate commitments, the failure of the original Build Back Better legislation in late 2021, and the eventual Manchin-Schumer compromise that produced the IRA.

Sunrise's role in this trajectory was real but partial. The Sunrise theory had been: pressure Democrats with movement energy and primary threats until they make climate a top legislative priority. The IRA is substantially less than the original Green New Deal demands, but it is substantially more than what existed before Sunrise. The compromise — a movement getting much of what it wanted, but not all — is typical of how American movements interact with the legislative system.

Sunrise as a movement has scaled back since 2022; its peak organizational moment was 2019–20. The organization continues to operate but at reduced scale.

The pattern

Both movements achieved partial substantive victories: the Tea Party in spending discipline, the structure of Republican congressional politics, and the eventual rise of populist Republicanism; Sunrise in the IRA's climate investments, the substantive shift in Democratic Party climate positioning, and the political framing of climate-as-jobs that has since become standard. Both saw their original organizational form decline as their issue agenda became absorbed into a major party.

What the comparison shows

Two movements, on opposite sides of the political spectrum, exhibit recognizable parallel structures:

The substantive content of these movements is sharply different. The Tea Party wanted less government; Sunrise wants more government action on climate. Tea Party activists are mostly Republican; Sunrise activists are mostly Democratic. Their political theory — what is wrong with America and what should be done — points in different directions.

But the organizational dynamics are recognizably the same. Each movement was triggered by external shocks. Each built a hub-and-spoke organization combining national professional infrastructure with local volunteer chapters. Each pursued a strategic mix of direct action and electoral pressure. Each shifted its party's policy substantially. Each saw its original form decline as its issues became absorbed into the partisan mainstream. Each left a faction inside its party and a generation of trained activists.

This is the analytical claim that ought to govern how a textbook treats movements. Movements across the political spectrum are institutional phenomena that operate by similar mechanics. The partisan valence is a feature of the substantive politics, not of the institutional form. A scholar who can analyze the Tea Party clearly should also be able to analyze Sunrise clearly — and a student trained on this analytical framework should be able to study any future movement that emerges, whether on the left, the right, or outside the standard left-right axis, with the same intellectual tools.

A closing observation

Both movements would, if asked, reject the comparison. Tea Party activists would object to being institutionally equated with Sunrise; Sunrise activists would object to being institutionally equated with the Tea Party. Each movement's self-understanding emphasizes its own moral seriousness and the distinctive rightness of its cause.

That is exactly the data the analytical framework can absorb. Movements typically believe their own causes are uniquely just. They typically believe their opponents' movements are illegitimate or astroturfed or extreme. The political-science framework is not concerned with adjudicating those moral claims. It is concerned with asking how the institutional form works, and what makes some movements succeed and others fail. By that question, the Tea Party and the Sunrise Movement are remarkably comparable cases, and a textbook can say so without giving up the moral seriousness of either.

Word count: approximately 1,850.