WASHINGTON – During a campaign rally last night in Nashville, President Trump repeated his assertion that spies had "infiltrated" his campaign.

"How do you like the fact they had people infiltrating our campaign," Trump asked. "Can you imagine? Can you imagine people infiltrating our campaign? Is there anybody in this big beautiful arena, right now that's infiltrating our campaign? Would you please raise your hand?"

The lines drew cheers, but away from the arena, some top Republicans, including Sen. Marco Rubio, have refused to go along and are getting increasingly vocal about defending the FBI.

"I am even more convinced that the FBI did exactly what my fellow citizens would want them to do when they got the information they got, and that it has nothing to do with Donald Trump," Rep. Trey Gowdy, R-S.C., said Tuesday on Fox News.

He repeated that Wednesday on CBS This Morning.

Rubio on Sunday said there was "no evidence" to support the theory that FBI used informants to gather information on Trump's campaign . "What I have seen is evidence that they were investigating individuals with a history of links to Russia that were concerning," he said on ABC's This Week.

"As far as what I have seen to date, it appears that there was an investigation not of the campaign, but of certain individuals who have a history that we should be suspicious of, that predate the presidential campaign of 2015, 2016," Rubio said.

"And when individuals like that are in the orbit of a major political campaign in America, the FBI, who is in charge of counterintelligence investigations, should look at people like that."

Rubio added: "If there is an FBI informant or any sort of inappropriate action that's been taken targeting a political campaign, the president's or any, we want to know about it and it should be punished."