Wrong for two reasons:
1) Obama brings the anti-war left that Clinton does not have. Go over to DU for proof of this.
2) Richardson is not needed as long as the Republican candidate takes a strong stand against illegal immigration. If McCain was the nominee, then Richardson would be needed to offset the appeal to illegals.
The anti-war left is not going to abstain from voting for Mrs. Bill Clinton. They certainly did not abstain from voting for "moderate" Democrats in 2006 either. While they may whine loudly at the Democrat party for not cutting off funding for the war, they won't abandon Democrat party candidates at the polls.
Richardson is not needed as long as the Republican candidate takes a strong stand against illegal immigration.
I'm not quite sure how you make this connection. I think a lot of Hispanics who have never voted would be drawn strongly to a Clinton/Richardson ticket simply because Richardson is Hispanic.