Seriously, Kirkpatrick didn't understand the question. From The Free Beacon:
Former Rep. Ann Kirkpatrick (D, Ariz.), the front-runner in the race, joined the other candidates in not raising her hand, appearing to reverse her prior support for Pelosi, the Daily Caller noted. Kirkpatrick voted for Pelosi for speaker on four previous occasions.
Kirkpatrick's staff later clarified that she would remain a supporter of Pelosi and had misunderstood how to respond to the question with a raised hand.