Well, let's see:
Andy Stern boasted to the
Las Vegas Sun in May 2009 that the SEIU "spent a fortune to elect Barack Obama--$60.7 million to be exact--and we're proud of it."
Andy Stern used to be President of the SEIU. After the election, he resigned and was appointed to the President's fiscal commission. Direct influence? Well, I suppose that's a matter of opinion, but what would you say if Chevron had spent $60 million getting Bush elected, and then the CEO had resigned to go work for him?
And "a bit of union siding with Democrats." Are you kidding me? Go to
this link (Open Secrets) and look at the top donations from 1989 - 2010. Look at the donations:
SEIU (95% to Democrats vs. 3% to Repubs)
Brotherhood of Electrical Workers (98% D vs. 1% R)
Laborers Union (92% D, 7% R)
Teamsters Union (93% D, 6% R)
National Education Association (93% D, 6% R)
Carpenters and Joiners Union (89% D, 10% R)
UAW (98% D, 0% R)
If that is what constitutes "a bit," then I guess you could say that when it comes to demographics and voting patterns, blacks do "a bit of siding with Democrats."