Jonathan Bernstein: Trump runs the Republican Party. Until it runs him.
It’s hard to identify anything that he has actually persuaded congressional Republicans to do.
President Donald Trump looks to Julia Cordover, the student-body president at Marjory Stoneman Douglas High School in Parkland, Fla., as she speaks during the listening session with high-school students, teachers and others in the State Dining Room of the White House in Washington, Wednesday, Feb. 21, 2018. (AP Photo/Carolyn Kaster)