President Donald Trump tweeted Monday that the Florida recount should be called in favor of Republicans Rick Scott for Senate and Ron DeSantis for governor because an "honest vote count is no longer possible."
The president, without offering any evidence, claimed ballots were "massively infected."
"Must go with Election Night!" Trump added.
Scott, the Florida governor who is running against incumbent Democratic Sen. Bill Nelson, and DeSantis, the former GOP congressman running for governor against Democratic Tallahassee Mayor Andrew Gillum, both hold narrow leads.
Gillum quickly shot back, saying the president sounded "nervous" about the recount.
NBC News has rated DeSantis as the apparent winner and the Senate race as too close to call.
It looked as if both would win their respective battles on Election Day, but as votes continued to be counted in Democratic-leaning Broward and Palm Beach Counties, both candidates' advantages shrunk. As of Monday morning, Scott holds a lead of about 13,000 votes, while DeSantis has an edge of about 33,000 votes over Gillum.
Both races are within the margin that legally triggers an automatic machine recount in the state. That recount is underway, with results due on Thursday.
In a Monday news conference, Democratic Rep. Ted Deutch, who represents parts of Broward and Palm Beach counties, accused Scott of having previously "used his power to manipulate the outcome of elections." Deutch said there was "no evidence" of voter fraud.
Meanwhile, Scott, speaking to Fox News Monday, said he "won the election" and added that "no recount has ever overturned a lead like that."
Trump, Scott, and other Republicans have claimed that Democrats are seeking to "steal" the election from them, suggesting that rampant voter fraud is taking place. But state election officials have said they have not seen evidence of such fraud, and Democrats such as Nelson said Republicans are simply afraid of having all of the votes counted.