Trump has used his clout to knock out senators in primaries, issue unachievable demands and force them into politically fraught positions. Some say it’s harming his own agenda.

“It's just another kink in the slinky that makes no sense,” said Sen. Thom Tillis (R-NC), who is not seeking reelection in November.

Trump has used his clout to knock out senators in primaries, issue unachievable demands and force them into politically fraught positions. Some say it’s harming his own agenda.