They certainly are not acting very confident. Their attacks on Sarah range from comical to hysterical to ridiculous. Caroline Baum has a good idea of why they act so scared:
No, the real reason the Democrats are scared to death of Palin's popularity is because if they lose this election, it will mean they are bankrupt as a party.
If the Democrats can't win a presidential election after eight years of an unpopular president, five years of an unpopular war, in the face of a lousy economy, a collapse in the housing market and overwhelming sentiment that the country is on the wrong track, it means something is terribly wrong.
This is as good as it gets for a party out of power. A loss in November would be embarrassing -- no, humiliating -- to the Democrats.
If they lose in '08, they will have no one to blame but themselves. Sarah Palin has raised the odds of a Democratic loss. That's why she has to be destroyed.
In a democracy, those who govern derive their power from the consent of the governed. The Democrats have won only three of the last ten presidential elections because the policies they advocate are unpopular, especially with white voters. Probably the most unpopular of all are the racist, so-called "affirmative action" programs that give preference to a member of a minority group over a white. Many whites, myself included, have experienced the unpleasant effects of racial discrimination.
It is likely that both Barack and Michelle Obama were given racial preference when they were admitted to the elite universities they attended. These policies were supposedly put into practice in order to correct past injustices. But the vast majority of the people who are being punished had nothing whatsoever to do with the injustices. And the influx of blacks and hispanics from foreign countries into the USA shows that this is not such a bad place for them at all.
So long as the Democrats continue to advocate racist policies, they will continue to lose elections.