Title says it all. This is why I’m not convinced that Rubio is even on the radar as a potential Vice-Presidential pick. Rubio is ambitious and more importantly, has plenty of buzz as a future Presidential candidate.
By going to Iowa, Rubio seems to be starting the process of feeling out the 2016 Presidential race. The risk of losing the 2012 election by being saddled with Mitt Romney, could somewhat damage the Rubio brand.
Iowa is still, however, a potential swing state in the 2012 cycle so it deserves some monitoring.