Rep. Jim McDermott, who had been hedging his bets (and holding out hope that Al Gore would get into the race), has become the 290th superdelegate to endorse Barack Obama. Says McDermott in a missive sent out this morning:I believe he will bring us together to achieve the kind of change we need in this country moving forward. As Democrats, we are fortunate to have two very talented public servants running to be the nominee of our party, and I have great respect for Senator Clinton. But I believe now is the time to unite behind Barack Obama so we can be in the strongest place possible to win in November. …I am confident that as president, Barack Obama will end the war in Iraq and bring our sons and daughters home, he will make universal health care a reality and he will restore our moral standing in the world.