Is there a limit to self-delusion? And if there is, what happens when the limit is exceeded?

New York Times columnist Gail Collins began her column last week as follows, "When Democrats run into each other on elevators, they exchange glances and sigh. Or make little whimpering sounds." She went on to observe that "Democrats are going bipolar. Democrats spend all their waking hours thinking about the swing states. If Wisconsin starts looking wobbly, their day is ruined." It makes you wonder what their days are going to be like if Obama loses the actual election.