Rubio's stumble while denying VP interest has some suggesting Freudian slip

National Journal's Major Garrett asked if he would still say no even if lobbied directly by presumptive nominee Mitt Romney.

"Yes," Rubio said.

But any attempt to squelch speculation that Rubio might be vying for the job was washed out when the senator made an inopportune stumble shortly thereafter.

"If I do a good job as a vice president — I'm sorry, as senator — I'll have the chance to do all sorts of things," Rubio said.

Speculation has ratcheted up over who Romney might select as his running mate since the Massachusetts governor effectively clinched the GOP nomination with Rick Santorum's exit from the race last week.

In a national survey released by Quinnipiac University Thursday, Rubio polled behind only New Jersey Gov. Chris Christie among potential vice presidential candidates. Some 31 percent of voters surveyed said Christie would be a good choice for Romney, while 25 percent picked Rubio.