The Florida senator’s backers are livid that the Kasich’s showing in Virginia may have kept their candidate from winning and will continue to hurt them in upcoming primaries; Kasich has indicated he will not drop out until after Ohio, and may be aiming to stay in as long as it takes to be a Trump alternative.

A Senate GOP insider openly questioned in an interview with BuzzFeed News whether Kasich had some inside deal with Trump. “You have to believe Kasich has made a deal with the devil. Why else is he still in the race? Kasich needs to look GOP voters in the eye and tell us whether he has a deal — explicit or implicit — with Donald Trump for a spot on the ticket.”

Other Republicans echoed similar sentiments.

“I like John Kasich, but no one is doing more to elect Donald Trump than Kasich is right now,” said Curt Anderson, who previously ran Bobby Jindal’s campaign. Jindal has since endorsed Rubio.