Over at The Nation's political blog, John Nichols reports on efforts by AFL-CIO Secretary-Treasurer Richard Trumka to get steelworkers and other union members to throw their support behind a black presidential candidate: Trumka knew that the steelworkers had backed John Edwards for this year's Democratic presidential nomination -- and that the union had only endorsed Obama when Edwards finally came around. He understood that a part of his job was to get a union that is especially strong in the battleground states of Ohio and Pennsylvania excited about a candidate who must win those states. Trumka knew, as well, that...