President Trump’s incendiary claims that his Democratic critics in Congress are un-American are driving a deep wedge between his 2020 campaign and critical elements of the coalition he needs to secure a second term.

Suburban women and college-educated whites sidelined doubts about Trump and provided support crucial to his victory over Hillary Clinton. But many, fed up with the president’s antics and rhetoric, defected to the Democratic Party in midterm elections two years later. Senior Republican strategists are warning that Trump’s divisive attacks on the four female minority congressional Democrats could permanently exile these key voting blocs, costing the president reelection.