Republican Dede Scozzafava's decisions to drop out of the race for New York's 23rd congressional district and endorse a Democrat raise questions about what place moderates have in the GOP.
Corzine, the incumbent, is neck and neck with the Republican challenger in the New Jersey governor's race. Obama will make two appearances with Corzine Sunday.
San Francisco Mayor Gavin Newsom on Friday said that he would not be running for governor of the state of California.
Turnout of Obama voters at the New Jersey and Virginia governors' races next week will hold a clue to the 2010 midterms, said Rep. Chris Van Hollen at a Monitor breakfast.
Speaker Nancy Pelosi unveiled the House's healthcare reform bill Thursday. She had to compromise with conservative Democrats on the public option in order to win their votes.
Many national conservative figures are supporting the Conservative Party's Doug Hoffman in a New York special election. Republican Dede Scozzafava is seen as too liberal.
Poll results tend to show that voters approve of the public option for healthcare. But senators like Joe Lieberman could vote the other way.
Incumbent mayors are facing tougher-than-usual reelection bids due, in part, to a struggling national economy.
Matthew Hoh, a former Marine officer, resigned from his current State Department post in Afghanistan, saying he no longer believes the war is worth American lives.
Majority leader Harry Reid said Monday that the Senate healthcare bill will include a public option that states can decline. But it is not clear how he can get the needed votes.