The SAVE America Act is a bill that would require proof of US citizenship to register and vote in federal elections. Here is what it would do and where it stands.

The bill’s core provision is documentary proof of citizenship, such as a passport or birth certificate, at registration. Supporters say it closes loopholes. Critics say it would disenfranchise millions of eligible voters who lack easy access to documents.

President Donald Trump has made passage a top priority and has threatened to withhold endorsements from Republicans who oppose it. The House has passed a third version of the bill.

In the Senate, the bill needs 60 votes to overcome a filibuster. Democrats have vowed to block it for weeks, calling it voter suppression. Republicans call it common-sense election security.

A viral video claiming the Senate advanced the bill 51-48 was debunked by Reuters in September. As of early October, the Senate had not passed it.

What happens next depends on whether Republican leaders can find 60 votes or change Senate rules, both steep climbs before the midterms.