Senate Majority Leader Mitch McConnell and House Minority Leader Kevin McCarthy both dismissed the idea.
Mr Trump does not have the authority to postpone the election, as any delay would have to be approved by Congress.
Earlier, the president suggested that increased postal voting could lead to fraud and inaccurate results.
He floated a delay until people could “properly, securely and safely” vote. There is little evidence to support Mr Trump’s claims but…