President Trump will make his case for a second term this week amid notable opposition—from within his own party.

The Republican National Convention will feature many well-known members of the Trump orbit, including most of his kids, the Republican leaders of the House and Senate, Trump consigliere Rudy Guiliani, the governors of Iowa and South Dakota and former United Nations ambassador Nikki Haley. But there will be no former presidents, no elder statesmen, no former Republican rivals and no party unity.

The GOP, in fact, may be more divided than any party in modern history as it formally nominates its presidential candidate. Trump jousted with several intraparty detractors in 2016, such as former Secretary of State Colin Powell, Sen. John McCain, and former Florida Gov. Jeb Bush. But Republican opposition to Trump in 2016 was scattershot and some detractors protested passively by declining to endorse Trump. Other Republicans who bashed Trump in the primaries got behind him once he was the party’s candidate.

Four years later, the Republican resistance has swollen, intensified and gotten better organized. On the first day of the national convention, more than two dozen former Republican members of Congress announced they’re supporting Democrat Joe Biden, including former Arizona Sen. Jeff Flake. This comes after Colin Powell and former Ohio Gov. John Kasich, who ran for the Republican presidential nomination in 2016, spoke at the Democratic convention, supporting Biden.

The Lincoln Project is a group of prominent Republicans running snarky anti-Trump ads with a mission “to defeat Donald Trump and Trumpism.” The group’s founders include conservative attorney Geroge Conway, husband of departing Trump strategist Kellyanne Conway, along with senior GOP operatives who helped run campaigns for party stalwarts such as McCain and both Bush presidents. Lincoln Project ads typically hammer Trump’s handling of the coronavirus crisis and lampoon his presidency.

In 2016, fifty former Republican national security officials published an open letter warning that Trump would endanger the nation. That number now exceeds 70, and the group has a 10-point list of specific ways Trump has done what they warned about four years ago. They’ve formed their own organization, Defending Democracy Together, to raise money, campaign against Trump and help Biden win in November.

It’s not just party pooh-bas opposing Trump. Another group, called Republican Voters Against Trump, collects stories of ordinary people who consider themselves Republicans or voted for Trump in 2016, but won’t vote for him this time around. In hundreds of video testimonials, these alienated Republicans explain why they feel the president has failed them.