When Donald Trump announced his candidacy for president on June 16, 2015, he changed the trajectory of the Republican Party.

But four years after winning the presidency, Trump and Republicans are now on the outside looking in, having lost control of the House, the Senate and the White House. A fight to define the future of the Republican Party is playing out among a small, but influential, group of Republicans, even as Trump remains central to the party and to its identity.

In a two-part video series, the Fix drew upon hours of archival footage and interviews with Post reporters to analyze how Trump took control of the Republican Party, tracing his rise to the 2008 financial crisis and the elections that followed, and breaking down what Trump’s rise means for the future of conservatism.

Former president Donald Trump has remained the main driver of the Republican Party priorities, despite losing his reelection bid in 2020. (Blair Guild, JM Rieger/The Washington Post)