You can be sure that most presidential candidates are going to pair up with musicians and other celebrities that hold the same view points for support. A couple weeks ago, we attended Brooklyn's Bernie-centric fundraiser, and of course Bernie's relationship with Killer Mike is well documented. At yesterday's Iowa City Concert and Rally, Bernie was again joined by a good handful of indie-faves, including Vampire Weekend and Foster The People. On stage, Bernie was joined by Ezra Koenig to sing Woody Guthrie's "This Land Is Your Land."