All three widely considered potential VP prospects.
CNN’s John King: Top McCain aide Charlie Black calls it “a social weekend,” denies a formal vetting process is underway.
Timesman Nagourney: Development “strongly suggests that he is moving into an intensified phase in his search for a vice presidential candidate.”
Veepstakes Quiz: For all the talk of gubernatorial running mates, when was the last time a major party candidate added to his ticket a sitting or former governor? The answer here.