6:33 p.m.: The tens of thousands of Obama fans are being entertained as they await the senator. The reggae musician Patrice kicked things off, followed by the rock band Reamonn.It isn't the first time that this tactic has been used to, presumably, up the attendance numbers for an Obama speech.
There were roughly 200,000 people in attendance, give or take a few thousand reggae fans.
(Thanks to Gateway Pundit)

