The congresswoman didn't have much of a shot anyway but this would seem to be the nail in the coffin.

Politico:

In a shock announcement Wednesday night, Iowa state senator and onetime Michele Bachmann campaign leader Kent Sorenson declared that he is now supporting Ron Paul for president.

Sorenson made the announcement at a Paul rally with veterans here in Des Moines, telling the crowd: "I believe we're at a turning point in this campaign."

Calling the decision to abandon Bachmann a painful one, Sorenson said he felt obligated to join Paul as the "Republican establishment" tries to undermine his campaign.

"I thought it was my duty to come to his aid, just like he came to my aid during my Senate race, which was a very nasty race," Sorenson said, pledging to go all-out for Paul over the next few days.

If there were five months instead of 5 days left before the Caucuses, Bachmann would have a good chance of weathering this storm. As it is, whatever momentum she thought she might have been generating is certainly gone now and all that's left to do is write the withdrawal speech.