Two Democratic electors from Colorado filed a federal lawsuit Tuesday, challenging a state law that requires they vote for the winner of the state's popular vote, the Denver Post reports.

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Polly Baca and Robert Nemanich had pledged to support Democrat Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE, the winner of Colorado's nine electoral votes.

But now they are joining so-called “Moral Electors” in other states and say they'll shift their Democratic votes to a consensus Republican pick -- if one emerges.

The "Moral Electors" want to persuade Republican electors in other states to vote for a third-party candidate, the Post reports, in an attempt to keep Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE from receiving 270 electoral votes.

Several states, including Colorado, prohibit electors from voting against the candidate who won the state's electoral votes. And Colorado Secretary of State Wayne Williams has already threatened to replace Baca and Nemanich if they try.

“Instead of honoring the will of the Coloradans who voted for them, these two faithless electors seek to conspire with electors from other states to elect a president who did not receive a single vote in November,” Williams said in a statement.

“The very notion of two Colorado electors ignoring Colorado’s popular vote in an effort to sell their vote to electors in other states is odious to everything we hold dear about the right to vote,” he added.

The members of the Electoral College are slated to meet on Dec. 19 to cast their official votes for president.

Trump clinched 306 electoral votes on Nov. 8.