Johnson has paired the continuing resolution, which would fund the government for another six months, with the SAVE Act, which would require proof of citizenship in order to become a registered voter. The SAVE Act was originally introduced by Rep. Chip Roy (R-TX) and passed in the House on its own in July. Every Republican voted for the SAVE Act, along with five Democrats.

The standalone version of the SAVE act is stalled in the Democrat-controlled Senate. It is unlikely to pass, and has yet to be brought to a vote in that chamber. President Joe Biden has promised to veto it should the bill make it out of the Senate.

Attaching the SAVE Act to the continuing resolution has not made it any more popular outside of the House. In fact, at least five House Republicans said they’re against the pairing, according to Roll Call. Republicans’ majority in the House is slim, meaning that providing no absences and a united front against it from Democrats, five Republicans are all that are needed to sink the resolution.

Rep. Thomas Massie (R-KY) said in the House Monday that even if the continuing resolution passes as-is, the Senate would remove the SAVE Act and send it back to the House. Even in the unlikely situation where the Senate lets the SAVE Act part stand, Biden’s reiterated that he would veto it, according to The Hill.

Critics of the SAVE Act point out that it’s irrelevant. Only American citizens are allowed to vote by law, and it’s very rare for noncitizens to try to vote illegally.

“This is a crime where not only are the consequences really high and the payoff really low — you’re not getting millions of dollars, it’s not robbing a bank, you get to cast one ballot,” said Sean Morales-Doyle, a lawyer at the Brennan Center for Justice, told MSNBC. “But what also makes this somewhat unique is that committing this crime actually entails the creation of a government record of your crime.

“It’s very easy to catch, and you will get caught.”

Morales-Doyle said that on the other hand, the SAVE Act would make it more difficult for actual citizens to vote because many do not have passports or access to their birth certificates. There is also a law against requiring proof of citizenship in federal elections, MSNBC reported.

Threatening government shutdowns has become a common ploy from the Republicans, and there have been 10 shutdowns since 1981, according to History.com. All but three of the 10 shutdowns were led by Republicans. One exception was in 1982, when both parties of Congress missed the deadline despite agreeing on terms. In confusion, some agencies sent employees home, but the shutdown only lasted three days, between September 30 and October 2.

The remaining two shutdowns were the result of Democrats protesting Trump’s policies. In January 2018, there was a four-day shutdown over Trump’s plans to phase out the DACA program allowing children of undocumented people to remain in the United States. The end of 2018 saw the longest shutdown in history. The issue was over funding Trump’s planned wall along the border of Mexico. The shutdown lasted over a month, until Republicans backed down.