Mike Lee talks to a delegate on the floor during first day of the Republican National Convention in Cleveland, Monday. | AP Photo Sen. Lee not sure whether he'll vote for Trump

Sen. Mike Lee declined to rule out voting for Libertarian nominee Gary Johnson on Monday, hours after Republican leaders succeeded in blocking a roll call vote on the convention rules. But the Utah Republican made two things clear in an interview with CNN's Wolf Blitzer: He is not voting for Hillary Clinton, and he is not there yet on Donald Trump.

"No, there is not," Lee told Blitzer, when asked if there is any chance he would support Clinton instead of Trump.


Blitzer then asked, "Is there a chance you could vote for Gary Johnson or a third-party candidate?"

"Look, I don't know," Lee responded. "Right now, I'm a delegate to the Republican National Convention. It's always my instinct to want ... to support Republican candidates."

In separate interviews with CNN and Fox News Channel, Lee acknowledged the low probability that Trump will not be the Republican nominee but reiterated that he is not yet supporting him.

"What I'm saying is that Donald Trump is almost certainly going to be the nominee," Lee told Fox News' Bret Baier. "He will be a stronger nominee if we have actual unity, rather than contrived unity. Rather than the kind of unity that results from coercion. That's not unity. What I'm saying is if we have an honest debate and discussion about the rules, we're going to have a lot of people who will have a lot more confidence in the party."

Speaking to CNN, Lee remarked that he did not blame Trump for the mayhem, but rather the Republican National Committee.

"This was a big mistake," Lee said.