Obama Vs Romney - Whose Tweets Are Getting The Most Engagement On Twitter (And Where)? [MAP]

Twitter has been very hands-on in the run-up to the 2012 U.S. Presidential Election, and both President Barack Obama and Republican candidate Mitt Romney have (wisely) been heavily using the micro-blogging platform to share their agenda and policies, raise awareness of where they are on the campaign trail and, perhaps, nudge those all-important undecided voters firmly in their direction.