US President Donald Trump tweeted a claim that Vice President Mike Pence can reject "fraudulently chosen electors" during the Congressional certification of the 2020 election results on January 6.
Mr Trump's tweet is the latest in a string of attempts to overturn the results of the election.
His opponent, president-elect Joe Biden, won the election with 306-232 votes in the Electoral College.
Mr Trump has not yet conceded to Mr Biden.
It is not likely that Mr Pence has the unilateral power to reject and alter the electoral votes.
The US constitution says the vice president is to preside over the Congressional certification of the election and to count the votes of the electors submitted in December.
"The president of the Senate shall, in the presence of the Senate and House of Representatives, open all the certificates, and the votes shall then be counted," the constitution says.
Vice President Mike Pence is also the president of the Senate and his role Wednesday is to oversee the counting. The constitution does not state he can "reject" electors, fraudulent or not, as Mr Trump claims.
Members of the House and Senate are the only US officials able to raise objections about electors or the votes.
Some Republicans have argued that the vice president should not be tied to the Electoral College votes. This was outlined in a recent case that Mr Pence asked a judge to reject. US courts turned down the case.
At least a dozen Republican senators have publicly stated they would object to the Electoral College vote. Another large coalition of Republican representatives in the House say they will do the same.
The move does not mean they can change the vote, but only that Mr Biden's electoral certification can be delayed.
Mr Pence, in a rally for the Georgia run-off elections, said he will "hear the objections" in Congress on Wednesday.
Those in Mr Pence's circle say he will abide by the constitution and the law, the Associated Press and Fox News report.
There is no evidence that any electors were chosen fraudulently, as Mr Trump claims.
Each of the electors are chosen by the state legislatures themselves and are chosen according to state law.
The congressional certification is the last step in confirming Mr Biden's election before his inauguration on January 20.