Senate Minority Leader Chuck Schumer (D-NY) vowed to fight “tooth and nail” against the Safeguard American Voter Eligibility Act on Sunday, claiming “over 20 million” people won’t be able to vote if it gets signed into law.

The House of Representatives passed the SAVE Act by a vote of 218-213 on Wednesday, but it is expected to have a tough time passing in the Senate, where the Republican Party has a three-seat majority.