Razor-thin margins in Florida's bitter races for the US Senate and governor are raising the possibility of recounts, potentially prolonging two of the most closely watched contests of the nation's midterm elections.In the governor's race, Democrat Andrew Gillum's campaign said on Thursday it's readying for a possible recount. He conceded to Republican Ron DeSantis on Tuesday night, though the race has since tightened. DeSantis led Gillum by 0.47 percentage point as of Thursday afternoon.Meanwhile, Democratic Sen. Bill Nelson has begun preparing for a potential recount in a race that is still too close to call against Republican Gov. Rick Scott. Scott held a 0.21 percentage lead over Nelson on Thursday afternoon.The tight races underscored Florida's status as a perennial swing state where elections are often decided by the thinnest of margins.In 2000, Florida decided the presidency by a few hundred votes in a contest that took more than five weeks to sort out.