Poll: Warren Now Trails in Mass.

My new piece at The Nation charts Obama's polling plunge--and notes anger among some of his supporters for sleepwalking through the debate and hurting not only his own chances, but other favored Dem candidates.  We've already seen such polls, including trouble for Sen. Sherrod Brown in Ohio, and just now comes first poll from Mass. showing flip flop in race there:   WBUR poll now has Scott Brown beating Elizabeth Warren by 3%.  She has led in nearly all polls in past two weeks.