The change isn’t expected to have broad implications, but rather tighten existing rules. It comes as the White House and Democrats play offense on the border and immigration, one of the top issues ahead of the presidential election.

“The proposed rule we have published today is yet another step in our ongoing efforts to ensure the safety of the American public by more quickly identifying and removing those individuals who present a security risk and have no legal basis to remain here,” said Secretary of Homeland Security Alejandro Mayorkas. “We will continue to take action, but fundamentally it is only Congress that can fix what everyone agrees is a broken immigration system.”

What would the new rule do?

Currently it can take years before migrants who cross the border without authorization are determined to be ineligible for asylum. The new rule would allow asylum officers to make that determination within days.

The rule would move up checks for bars to asylum, such as criminal history or terrorism links, to the initial stage of the process, allowing immigration officials to quickly reject and deport those who don’t qualify. It is not expected to restrict more people from applying for asylum.

Immigration officials said the number of migrants subject to the bars is small but did not offer concrete figures.

Migrants who intend to apply for asylum must first pass so-called credible fear interviews, which allows them to later make their case before an immigration judge. The regulation would allow asylum officers to check for public safety or national security risks during the credible fear screening.

Migrant rights advocates say the change could slow down and weaken the credible fear process.

But a senior DHS official who spoke to reporters Thursday on the condition that he not be named said the rule won’t meaningfully increase the time it takes to interview someone.

The official said the agency is updating procedures to ensure available information, including information that is classified, is shared as early as possible in the immigration process. The rule allows the agency to save taxpayer money because many immigrants who are subject to asylum bars are detained throughout the lengthy immigration court process, the official added.

When does it take effect?

Proposed rules can take months to finalize, and must go through a public comment period before implementation. That could make for a close timeline before the November election.

The DHS official said the agency will accept comments for 30 days starting May 13 and expects to issue the rule fairly quickly after that.

What else has the Biden administration done to curb border crossings?

Last year, the administration began disqualifying migrants from asylum if they enter the U.S. illegally without first requesting humanitarian protection in another country, such as Mexico, along the way. This effectively blocks most people from accessing asylum if they cross unlawfully.

At the same time, the administration expanded a phone app, CBP One, that lets migrants in Mexico schedule a time to be processed at official ports of entry. Officials also expanded a program that allows migrants from certain countries, such as Venezuela, fly directly to the U.S. if they have a sponsor.

On Wednesday, advocate groups sued the federal government for records about its policies and practices related to the mobile app, calling it a barrier to asylum because of frequent glitches and months-long waits for an appointment.

What more is the administration considering?

The new asylum rule comes as the administration mulls how else to cut down on illegal border crossings ahead of the election.

Biden said in a Univision interview last month that he is considering whether to invoke a sweeping presidential authority to more broadly restrict asylum without congressional authorization. The action would employ a section of the Immigration and Nationality Act called 212(f), which allows presidents to suspend entry of migrants when deemed detrimental to national interests.

Former President Trump used that authority to justify restrictions including travel bans against people from predominantly Muslim countries.