Mark Kelly knows a thing or two about flying high—both literally and otherwise. As a NASA astronaut, he was part of four space shuttle missions between 2001 and 2011, amassing more than 54 days in space and covering more than 22 million miles. Now he’s a Senator from Arizona who is on the short list to be Vice President Kamala Harris’ running mate. Political handicappers have Kelly sharing the inside track for the veepstakes with Pennsylvania Governor Josh Shapiro, Kentucky Governor Andy Beshear, and Minnesota Governor Tim Walz.