Obama needs to shore up the union vote in a climate where good jobs are going to hell. (Well all jobs, but i mean, union jobs espiecally.)
A lot of the Union Democrats are Social Conservatives who only vote republican because the democrats are supposed to care about things made in America, fighting their bosses and protecting American jobs.
With things as they are, he could lose them... and unlike a liberal's vote... a Union democrats vote might go to Romney, making it a "Double" loss.
It's the same reason why Obama keeps talking about how congress needs to immediatly pass free trade bills that he hasn't even submitted to congress.
It's Obama putting on a big show for Ohio and the othern Northern swing states, like he did during the democratic primaries when he promised to "Revoke NAFTA until it works for America."
Which he then did a complete 180 on once he had their primary votes.
