Congress in Reverse

After years of divided government, countless Republicans campaigned on a promise to repeal the Affordable Care Act, better known as Obamacare. Yet when they took control of both chambers of Congress and the White House in 2017—after six years that included more than fifty symbolic votes and innumerable pledges—they failed to repeal the bulk of the law. Pundits were shocked, and observers and political scientists alike were stuck looking for an explanation. What made Obamacare so hard to repeal?