Challenging Democrats to put their emphasis on election security to the test, President Donald Trump called for voter identification requirements in any election security legislation.

President Trump tweeted:

"No debate on Election Security should go forward without first agreeing that Voter ID (Identification) must play a very strong part in any final agreement. Without Voter ID, it is all so meaningless!"

Trump — who won the White House in 2016 in the Electoral College — has long claimed he did not win the popular vote only because of illegal voting.

Trump tweeted just weeks after his Electoral College victory over Hillary Clinton in November 2016:

"In addition to winning the Electoral College in a landslide, I won the popular vote if you deduct the millions of people who voted illegally."

The Democratic-controlled House has passed two election security bills, but Senate Majority Leader Mitch McConnell, R-Ky., has yet to permit the bills to come up for debate. The bills require paper ballots to avoid hacking electronic votes and would require candidates by law to report potential foreign election meddling.

Sen. McConnell rejected the House Democrats' efforts as moving "partisan legislation."

"Clearly this request is not a serious effort to make a law," McConnell said, per The Hill.

"Clearly something so partisan that it only received one single solitary Republican vote in the House is not going to travel through the Senate by unanimous consent."