And by a rather large margin:

Today Barack Obama earned the endorsement of MoveOn, one of the largest grassroots membership organizations in the United States, after clobbering Hillary Clinton by 40 percent in Internet balloting. Obama led the final tally 70.4% to 29.6%, clearing the supermajority required for the endorsement. MoveOn, which has never endorsed a presidential candidate before, boasts that it has 1.7 million members in Super Tuesday states. The group has over half a million members in California alone – roughly one out of ten primary voters in Tuesday’s largest state.

This is actually big news and I am sure some talking heads will be hitting on it sometime over the next few days.