I'd encourage everyone to go beyond the page Tech linked to. It doesn't even begin to tell the whole story. Illinois voting rules allow the "present" vote, which can be mis-interpreted as ducking the issue...but in fact, it's not that simple.

Pam Sutherland, president of Illinois Planned Parenthood Council, said Mr. Obama was one of the senators with a strong stand for abortion rights whom the organization approached about using the strategy. Ms. Sutherland said the Republicans were trying to force Democrats from conservative districts to register politically controversial no votes.

Ms. Sutherland said Mr. Obama had initially resisted the strategy because he wanted to vote against the anti-abortion measures.

“He said, ‘I’m opposed to this,’” she recalled.

But the organization argued that a present vote would be difficult for Republicans to use in campaign literature against Democrats from moderate and conservative districts who favored abortion rights.

Lisa Madigan, the Illinois attorney general who was in the Illinois Senate with Mr. Obama from 1998 through 2002, said she and Mr. Obama voted present on the anti-abortion bills.

“It’s just plain wrong to imply that voting present reflected a lack of leadership,” Ms. Madigan said. “In fact, it was the exact opposite.”