Chris Cillizza has the news, which he seems to slip into a more or less unrelated article (in parens, no less):

(It's worth noting that a national party committee pulling advertising out of a state isn't always a bad sign. The Democratic Senatorial Campaign Committee has pulled its advertising in the Colorado Senate race, but that is a sign of their confidence of winning, not their acceptance of defeat.)

This isn't the largest piece of news ever, especially considering that folks like Charlie Cook already predict that the Democrats will pick up between seven and nine seats in two weeks (this Colorado seat likely being number three out of them). Nevertheless, this is a seat that the Republicans had hoped to hold on to in a state that although trending Democratic still has fairly deep Republican roots. This very seat, in fact, nearly went Democratic in each of the last two times it came before the voters of the state of Colorado, only to be won by the Democrats. And yet the Democratic Senatorial Campaign Committee feels confident enough about Colorado that they are pulling out and moving on to new states like Georgia -- expanding the map and increasing the party's chances of reaching 60. If you want to help out in the effort, head over to the MyDD Road to 60 Act Blue page and make a contribution today.