White House chief of staff doubled down on mail-in voting fraud claims, but says USPS won't remove sorting machines before the election

White House chief of staff Mark Meadows sparred with host Jake Tapper on CNN's "State of the Union" Sunday, doubling down on the administration's previous claims about mail-in voting.

Tapper repeatedly pressed Meadows on President Donald Trump's refusal to sign a relief bill that includes emergency federal funds for the United States Postal Service, sabotaging mail-in voting, but Meadows dismissed the idea that Trump was blocking aid to the service and said the White House could be open to passing a standalone bill for USPS funding.

Tapper pointed out that the president and first lady Melania Trump would be voting in Florida with mail-in ballots this year, and asked Meadows for the difference "between voting by mail in Florida and, say, voting by mail in Pennsylvania?"

Meadows didn't cite a difference, but said he feared votes from him and other Americans were going to be "disenfranchised," adding that sending ballots to Americans across the country was "asking for a disaster."

"But there's no evidence of widespread voter fraud," Tapper said.

"There's no evidence that there's not either," Meadows shot back. "That's the definition of fraud, Jake."