President Joe Biden is seemingly vowing to block legislation, known as the Safeguard American Voter Eligibility (SAVE) Act, that would require proof of American citizenship before an applicant is registered to vote in federal elections.

The SAVE Act, introduced by Rep. Chip Roy (R-TX) and co-sponsored by more than 100 House Republicans, would require state election officials to mandate voter registration applicants provide proof of American citizenship before they are added to the nation’s voter rolls.