Reply #75: And destroy any chance of Democrats holding the White House in the process.

[Arkana]

Let's see, how did it go the last couple of times a sitting Dem President faced a primary challenge from the left:

1968: Eugene McCarthy/Bobby Kennedy. Eventually the nominee became Hubert Humphrey and he lost a close one to Tricky Dick because of massive Dem infighting.

1980: Ted Kennedy. He weakened Carter right out of the gate in an election he desperately needed to win, and Saint Ronnie McReagan became President instead.

Your argument is invalid. A primary challenge wouldn't do shit to pull the party to the left, and all it would do is create a media narrative that Obama is weak and pave the way for President Sarah Palin and the coming "Road Warrior" apocalypse.