For those of us who are Obama supporters, this is good news.

The official announcement will be tomorrow.

Below the fold some of the key paragraphs.

Here are two key paragraphs.

McCaskill has praised Obama often and was widely believed to favor the Illinois senator over Clinton. But the Senate freshman had resisted openly supporting a candidate until now, saying she wanted to preserve working relationships with Senate colleagues.

She said last week that she identifies with the desire for change often voiced by Obama supporters.

This article ends with some of the endorsements.

For Clinton — former House Majority Leader Dick Gephardt, former Govs. Bob Holden and Warren Hearnes, St. Louis Mayor Francis Slay and Emanuel Cleaver

For Obama — William Lacy Clay and Russ Carnahan, along with St. Louis County Executive Charlie Dooley.

And, Susan Montee has endorsed Obama.