Republican Sen. John Thune of South Dakota, a name often mentioned as a potential running mate for Mitt Romney, did not rule out the prospect when asked about it directly on Sunday.
“You never rule out opportunities or options,” he said on Fox News Sunday. “When you’re involved in public life and you say you want to make a difference, if you are serious about that, obviously, you don't foreclose options.
“But in my view, I have a job in the United States Senate and I like what I’m doing. I think I can make a difference there,” he said, adding that “I don't aspire to anything else.”