Mitt Romney's decision for Vice President will come down to only one factor: Who is from a swing state.

Rob Portman and Bob McDonnell are the only two options for Romney when it comes to that criteria.

Mitt Romney will not have to worry about selecting somebody that will energize the base (i.e. Bobby Jindal, Chris Christie, Marco Rubio) because the base is already energized enough.

With President Obama actually coming out and saying that if they win Virginia then they can win the election, then it would make complete sense for Mitt Romney to choose Bob McDonnell. McDonnell is a popular governor in one of the most - if not the most - crucial swing state of all. Obama won Virginia in 2008 easily, what better way to really "stick it" to Obama than to choose the Governor in the state that Obama says he needs. Also, just for enhancement of the point, Bob McDonnell has not been governor long enough to really have an Achilles heel that could hurt the campaign. Also, Conservatives love people with military experience - Bob McDonnell has that and it will surely help Mitt Romney's falling foreign policy experience.

Rob Portman, like McDonnell, comes from one of the most crucial swing states in any elections. If Romney really wanted to focus on the economy he would choose Rob Portman. Portman was a trade representative and he was the director of Office Management and Budget under the Bush Administration. Being that he served twelve years in the Ohio legislature, was a trade representative, and is a current Senator, he would really show some true Washington experience, which Mitt Romney lacks. One of President Obama's biggest questions before chose Joe Biden to be VP was his Washington experience, he chose Biden to help wash away any concerns of him being prepared. The only problem that Mitt Romney could face with Portman would be that he has spent time in Washington, which is something that conservatives really don't want, and that he worked under the Bush administration, which is still very unpopular and the Democrats could pounce on.

Based on all of these factors, I think it would more than likely be in Romney's best interest to choose Bob McDonnell. McDonnell is somebody who is young and energetic enough to sway some of those swing votes, and he comes from a very crucial state - one that could easily turn the election into Romney's favor.