Former Chief Financial Officer Alex Sink is going to run for Congress in a special election.
Sink announced Wednesday that she will move to Pinellas County and run for the seat that had been held by U.S. Rep. Bill Young. Young died earlier this month.
Sink was the Democratic nominee for governor in 2010 and narrowly lost the election to Rick Scott. In September Sink said she would not challenge Scott next year.
In a statement Sink said she said she was responding to a "deep frustration with the dysfunctional and reckless politics of Washington" among Pinellas County residents.
Young was a Republican, but his district is viewed as a pick-up opportunity for Democrats.
Democrat Jessica Ehrlich, who lost to Young last year, had already declared her candidacy for 2014.