President Obama is stepping up his social media game yet again. He’s now the highest profile member of the location-based check-in service FourSquare. The White House announced on its blog that they’ll be using FourSquare to post Mr. Obama’s whereabouts as he travels across the country on his economic tour. The president will also be leaving “tips” on the places he’s visiting, what he did there, and historical tidbits. With Obama already on Facebook, Twitter, and LinkedIn, FourSquare (which just hit 10 million members) looks to be another powerful tool in Mr. Obama’s social media arsenal as he lobbies for re-election.