“I intend to,” said Sen. Rob Portman (R), who faces a tough re-election in Ohio, a swing state and presidential battleground. “I guess you could come up with some scenario where something crazy could happen but I think the country’s in trouble and I think if we don’t have new leadership and new policies, it’s hard to imagine it getting back on track.”

Sen. Lamar Alexander (R-Tenn.), who ran for president in 1996 and 2000, said, “I have always supported the presidential nominee.”

But he left himself a bit of wiggle room.

“That’s as far as I’m going on presidential politics,” he added.

No members of the Senate have endorsed Trump, though Sen. Jeff Sessions (R-Ala.) was seen at a Trump rally in Alabama wearing one of the candidate’s “make America great” hats and has talked to him about immigration.