From tomorrow's NYT:

The Pennsylvania campaign, which produced yet another inconclusive result on Tuesday, was even meaner, more vacuous, more desperate, and more filled with pandering than the mean, vacuous, desperate, pander-filled contests that preceded it.

Voters are getting tired of it; it is demeaning the political process; and it does not work. It is past time for Senator Hillary Rodham Clinton to acknowledge that the negativity, for which she is mostly responsible, does nothing but harm to her, her opponent, her party and the 2008 election.

If nothing else, self interest should push her in that direction. Mrs. Clinton did not get the big win in Pennsylvania that she needed to challenge the calculus of the Democratic race. It is true that Senator Barack Obama outspent her 2-to-1. But Mrs. Clinton and her advisers should mainly blame themselves, because, as the political operatives say, they went heavily negative and ended up squandering a good part of what was once a 20-point lead.

(emphasis added)

Kool-aid kills brain cells. There is no other explanation.