@MontereyJack,
According to most liberal Democrats, Obama is a center or even center right president. They're not looking to dump him as the nominee in 2012, but the bloom is off the rose and the kool-aid has already started to taste like cheap sugar water.
Maybe they're hoping that without the pressure of re-election over his head, Obama will revert to true form and be the guy they hoped he would be back in 2008, when he was pledging to close Gitmo on Day 1 of his administration and talking to that plumber Joe about redistributing wealth. If he doesn't they're not going to be dancing in the streets again if he wins in 2012. If he loses though, Republicans will be dancing in the streets and it will be because he's gone.
I don't know if there is a Democrat who is to Republicans what Sarah Palin is to Democrats, not even Obama himself. I used to think Bill or Hillary Clinton generated the same degree of hatred among Republicans as Palin does among Democrats, but not anymore.
Both Bill and Hillary Clinton have prompted some irrational loathing in Republicans, but it was hard for a lot of them not to experience some reluctant fondness for Bill the Likeable Rogue, and for a while Hillary got some sympathy for being the long suffering wife. She also received some respect (albeit begrudged respect) from Republicans who perceived her as taking Obama on from a lunch box position somewhere at least within sight of the Center on a clear day.
On the other hand, for Democrats, Sarah Palin has no redeeming qualities. Zero, nil, none, bubkus. Her motherhood is insulted as is her appreciation for nature and outdoor activities Her occasional pithy frankness is found to be nauseating and she is mocked even for her good looks. To top off the full extent of the pathology of Palin Derangement Syndrome there are plenty of her critics who think that her son with Down’s Syndrome is fair game for nasty and tasteless "humor."
Obviously Liberals and Conservatives think very differently, even as far as the symbolism and analogies they employ.
For conservatives the prospect of a second Obama term will have them thinking of moving to a different country, and if there was even more horrendous possibility they might consider shooting themselves.
Liberals can't take the dole with them if they leave the country so that will never be the penultimate consideration for them. Maybe if one of the current candidates for the Republican nomination wins the presidency, despondent Democrats will consider forcing him or her to leave the country.
What consideration do they save for the worst of all possible catastrophes, a presidential victory by the Apex Predator, Sarah Palin? What might the liberal equivalent of conservatives shooting themselves be? Rather than approach that uncivil path I will leave it to your imaginations.
Oh.... I just thought of someone whose winning a four year term as Chief Executive of our government and Commander in Chief of our military might cause me to contemplate suicide: Michelle Obama.