Ranking The Top 5 GOP 2012 Contenders

Although Barack Obama has only been in office for a couple of months, this hasn't stopped the 2012 Republican presidential contenders from jockeying for early position in what will likely be a crowded GOP field, and if the length of the 2008 campaign was any indication, it won't be long until the race for 2012 will get going. The question is who among the contenders will challenge President Obama?