This is one reason why I like Rubio so much. He is solidly grounded in reality. This quote is via the Contentions blog. I'll add the link later since I'm via iPhone:
"I have my hands full with this election. I'm not going to be a vice presidential or presidential contender," he said of the conservative commentators lately touting him as a White House contender. "Just the fact that I'm addressing it embarrasses me."