Union members make up 60% of the U.S. electorate despite being only 12% of the labor force.
For Barack Obama to win in November, he needs the support of more than 60% of union members.
Many union members in Wisconsin, more than at this point in the 2004 election, remain undecided. This helps explain why McCain is abandoning Michigan, where Obama's support has surged as the economy has tanked, and is shifting resources into Wisconsin.
Why are some Wisconsin unionists withholding their support?
Some say they are "just not comfortable with Obama" or they "don't really know who he is." Others say they "won't vote for a Muslim" or that "Obama doesn't have enough experience." It's clear that at least some of the reluctance is because he is African American.
Richard Trumka, Secretary Treasurer of the AFL-CIO and former United Mine Workers President, addressed this issue directly at a recent steelworkers meeting.
Check out his compelling speech.