While the Florida Department of Law Enforcement said there had been no allegations of fraud, Scott asked - but did not order - the agency to investigate the counties' elections departments. Under Florida law, a recount is mandatory if the winning candidate's margin is less than 0.5 percentage points.
"I will not sit idly by while unethical liberals try to steal this election", Mr Scott said.The race is headed for a recount, as are the contests for governor and agriculture commissioner.
Even as Republican Rick Scott was delivering his victory speech in Naples just after midnight, a few counties were still fielding a trickle of ballots.
There were two recounts in local races afterwards.
Elections officials in Broward County, where Democrats have a large advantage, were still reviewing ballots Thursday. This means officials will have to go through ballots that were entered as 'errors'. At the time, the state lacked uniform rules for how to proceed.
Under Florida law, absentee and provisional ballots are only counted if the signatures on them match the signatures that elections offices have on record.
For demanding that Broward adhere to state law, Rubio was accused of to trying to stop some votes from being counted.
Only about 15,000 votes separate the candidates.
The ballots yet to be counted place both Scott and Ron DeSantis is perilous positions.
With Broward still counting early and mail ballots and Palm Beach County still counting mail ballots, Gov. Rick Scott holds a lead of.18 percent over Sen. As the numbers tightened, Scott worriedly called for an investigation into those ballots.
An automatic recount also appeared certain in a high-profile state Senate race in Hillsborough County.
By 2 p.m., Gillum gained on DeSantis by another 4,441 votes, and now trails by only 0.47 percent.
President Donald Trump is weighing in on the Florida Senate race, citing the possibility of election fraud.
Democratic lawyer Marc Elias, who is representing the Nelson campaign, on Thursday morning predicted that the margin would necessitate a hand recount. DeSantis led Gillum by 0.47 percentage point as of Thursday afternoon.
"On Tuesday night, the Gillum for Governor campaign operated with the best information available about the number of outstanding ballots left to count", said a statement sent by the Gillum campaign Thursday.