The Republican-controlled US House on Wednesday passed a new version of the SAVE Act, a sweeping voter restriction bill that would require people to show citizenship documents to register to vote and strict forms of photo ID to cast a ballot, potentially disenfranchising tens of millions of Americans.

The House passage of the new bill, now called the SAVE America Act, comes roughly a week after President Trump called on Republicans to “nationalize the voting” and “take over the voting in at least 15 places.” While the latest iteration of the SAVE Act does not usurp state and local election administration in precisely that way, it would still massively federalize new restrictions on voting that Trump and his allies have pushed for years.

The centerpiece of the bill remains a requirement that voters show proof of US citizenship, such as a passport or birth certificate, to register to vote. Nine percent of American citizens, roughly 21 million people, don’t have ready access to citizenship documents, according to a study by the Brennan Center and other voting rights groups.

That likely understates the number of Americans who could be burdened by the bill, since most people do not carry around citizenship documents with them. Half of Americans, roughly 146 million people, do not have a passport. And 69 million women who took their partner’s last name and do not have a birth certificate matching their legal name could find it much harder to register to vote under the bill.