Rubio has had brushes with scandal. One of his friends David Rivera Congressman form South Florida is under investigation and very seriously so for living off a party credit card for ten years. Rubio charged $100,000 on that party credit card and $16,000 he spent for personal items. But had repaid American Express. If he were chosen he would have had to list each item and something that would not be good for the media and Obama to be harping on. There was also another scandal close to Rubio that could have come back to bite him politically even though nothing really was shown that he had done anything wrong. I think you will find that Romney did not want to invite the scrutiny about this stuff into the campaign.
One drawback is it sounds like Ryan is up for reelection this year. So is he going to have to withdraw or will he pull a Biden and stay on both ballots? Then if he loses the White House run, that means we’d be without Ryan in government at all to help counter Obama for the next 4 years. Boy would that suck. No chance for him in the Wisconsin Senate either. They have an open seat also up for election this year, and a Republican holds the other seat through 2016.
You give a good summary of Rubio’s appearance of scandal. Zer0’s Chicago tactics is to take out the opposition with the skeletons in their closet.