20 House Republicans plan to file a lawsuit late Tuesday against Speaker Nancy Pelosi in an effort to block the chamber’s new proxy voting system amid the coronavirus pandemic, three congressional sources tell Axios.

The big picture: The lawsuit, led by House Minority Leader Kevin McCarthy, alleges the rules are unconstitutional because the Constitution requires a quorum, or a majority, of lawmakers to be physically present in order to conduct business. The lawsuit was first reported by the Wall Street Journal.

The historic rule allows Pelosi to initiate remote operations for 45 days and for House members to direct another member vote on their behalf if they can’t make it to the Capitol