Now that Mitt Romney has the Republican nomination in the bag, all eyes and ears have turned to speculation about his vice-presidential pick. Within the Romney camp, the vetting has begun. Sen. Marco Rubio of Florida campaigned with Romney in Pennsylvania this week, Gov. Chris Christie accompanied the candidate in New Jersey, Sen. Rob Portman was on the stump in his home state of Ohio, and Rep. Paul Ryan introduced Romney in events in Wisconsin. These are just a few of the names that have been bandied about and no doubt there are more. What makes a good running mate? Does being from a swing state matter? How about the ability to unite the party? And what about having the skills to step into the presidency should the need arise? In this hour of Radio Times, we’ll focus on vice presidential politics — who’s in the race, what do candidates look for in their running mates and what makes a good vice president? Our guests are REID WILSON of National Journal Hotline and JOEL GOLDSTEIN, professor of Law at Saint Louis University.