Well this is an interesting turn of events for the Bachmann & Paul campaigns.
From The Guardian:
This is quite a blow to the Bachmann campaign, which is practically on life support at this stage of the game. In an effort to save face, Bachmann responded to the departure by alleging that Sorenson sold himself out and left to go to the Paul campaign after they offered him money:
The US Republican candidate Michele Bachmann's Iowa campaign chairman has resigned and endorsed rival Ron Paul, six days before Iowa voters begin the nomination process to select the party's 2012 presidential nominee.
Kent Sorenson, an Iowa state senator who had served as Bachmann's state campaign chairman for nearly a year, said he had decided to switch his support to Paul because the campaign had reached "a turning point".
“Kent Sorenson personally told me he was offered a large sum of money to go to work for the Paul campaign,” Bachmann said in a hastily arranged news conference outside a Pizza Ranch in Boone, where she held her 11th campaign event of the day.
It turns out though that that might actually be a complete lie, as Michele Bachmann's Iowa political director Wes Enos later issued a statement completely contradicting the Minnesota congresswoman:
“I won’t say much about the situation or the conflicting statements beyond this; I can say unequivocally that Kent Sorenson’s decision was, in no way financially motivated.
While I personally disagree with Kent’s decision, and plan to stay with Michele Bachmann because I truly believe in her, I cannot, in good conscious watch a good man like Kent Sorenson be attacked as a ‘sell-out’ ….That is simply not the case, and it was not the basis of his decision,” said Mr. Enos.
So Michele Bachmann comes right out and says "he's just doing it for the money" and within hours her political director says it's completely untrue. Not off to a good start considering her chairman just resigned on the same day. And all of this just 6 days before the Iowa Caucus.