Voting by proxy was allowed in the House of Representatives for the first time on May 27. Many House Republicans were furious. Here's why. (Video: The Washington Post)

House lawmakers cast the first-ever remote congressional floor votes Wednesday — albeit under a legal cloud after Republican leaders filed a federal lawsuit challenging the constitutionality of the arrangement.

The new system of voting by proxy was pushed forward by House Speaker Nancy Pelosi (D-Calif.) and fellow Democratic leaders this month as a temporary measure, they said, that would allow lawmakers’ full participation during the global coronavirus pandemic, which has made travel and in-person meetings hazardous.