The Obamacare Repeal Efforts refer to a sustained multi-year campaign (2010-2017) led primarily by Republican members of Congress, conservative advocacy groups, and public opinion influencers aimed at repealing, replacing, or significantly altering the Patient Protection and Affordable Care Act (ACA), commonly known as Obamacare. Launched immediately following the ACA's passage on 2010-03-23, the efforts encompassed over 60 legislative attempts to repeal the law in full or in part, fueled by ideological opposition to government involvement in healthcare, concerns over costs, and political strategy to undermine the Obama administration. Key players included the House Republican leadership, such as Speaker John Boehner and later Paul Ryan, alongside organizations like the Heritage Foundation, Americans for Prosperity, and the Tea Party movement, which mobilized grassroots support through rallies, petitions, and media campaigns.

The campaign intensified after the 2010 midterm elections, where Republicans gained control of the House, leading to repeated votes for repeal that were largely symbolic due to Democratic control of the Senate and President Obama's veto power. Momentum peaked in 2017 under President Donald Trump and a Republican-controlled Congress, resulting in the passage of the Tax Cuts and Jobs Act, which eliminated the ACA's individual mandate but fell short of full repeal. Despite numerous failures, the efforts reshaped the national debate on healthcare, contributed to the rise of alternative proposals like the American Health Care Act, and highlighted deep partisan divides. Public opinion was mixed, with polls showing varying support for repeal depending on framing, and the campaign faced criticism for potentially destabilizing insurance markets and increasing uninsured rates.

Overall, the Obamacare Repeal Efforts exemplified a blend of legislative maneuvering, public advocacy, and political theater, influencing subsequent policy discussions and contributing to the 2018 midterm backlash against Republicans. While full repeal was never achieved, partial modifications and ongoing challenges through litigation and state-level actions extended the campaign's impact beyond 2017.