AUSTIN — President-elect Donald Trump campaigned on launching a historic border security crackdown and deporting a record number of migrants.

Both initiatives and other proposed immigration policies would have a significant impact on Texas, which shares a 1,254-mile border with Mexico.

Here are five things to know about immigration plans Trump discussed during the campaign:

Mass deportations ‘on day one’

One of Trump’s key campaign promises was to deport a record number of undocumented migrants, a policy he plans to implement immediately.

“On day one I will launch the largest deportation program in American history to get the criminals out,” Trump said at a rally last month at Madison Square Garden in New York City. “I will rescue every city and town that has been invaded and conquered, and we will put these vicious and bloodthirsty criminals in jail and kick them the hell out of our country as fast as possible.”

The number of undocumented migrants in the United States is unclear, but the Migration Policy Institute, a nonpartisan think tank in Washington, D.C., estimates it to be at least 11 million.

In an interview with Time magazine published earlier this year, Trump said he plans to use local law enforcement and the National Guard to help with deportations.

“I would have no problem using the military, per se,” Trump said. “We have to have safety in our country. We have to have law and order in our country.”

Trump has previously pointed to a program under former President Dwight Eisenhower, known as “Operation Wetback,” a derogatory slur for Hispanic people, that used military tactics to round up and remove migrant workers.

Will there be detention camps?

Vice President-elect JD Vance told The New York Times last month that the administration could start with 1 million deportations a year, a massive jump from previous administrations. In Trump’s first four-year term, his administration deported about 1.5 million people, according to Department of Homeland Security data.

Carrying out a massive number of deportations would require the federal government to add detention space to handle large-scale arrests. More than 37,000 people were in Immigration and Customs Enforcement detention facilities on Sept. 8, according to data compiled by Syracuse University’s Transactional Records Access Clearinghouse.

Stephen Miller, a senior adviser to Trump, told The New York Times last year that detention camps would likely be built “on open land in Texas near the border.”

Trump told Time there is unlikely to be “much need” for camps because officials will attempt to quickly remove migrants.

Money for Operation Lone Star

Texas Gov. Greg Abbott launched Operation Lone Star in March 2021 to use state resources — including National Guard troops and state troopers — to crack down on illegal border crossings.

Texas has spent more than $10 billion on the program, which included busing tens of thousands of migrants to Democratic-run cities and building dozens of miles of border wall. Abbott has asked lawmakers to add another $2.9 billion for border security in the 2025 legislative session.

At a news conference Wednesday in Tyler, Abbott said the additional money may not be needed.

“Because President Trump will provide a more secure border than any president in the history of the United States of America, that means that Texas will have the opportunity to consider repurposing that money for other purposes,” he said.

Remain-in-Mexico policy

Trump could bypass Congress and use his executive authority to limit immigration at the southern border, including reinstating his first-term remain-in-Mexico policy, which required asylum seekers to wait in Mexico until their hearing in U.S. immigration court, something that could take years because of a massive backlog in immigration cases.

“So many of these policies President Trump can put back in place with executive orders,” Miller told CBS News on Wednesday. “He doesn’t have to wait until months down the road. He can simply flip the switch on day one.”

Critics say the remain-in-Mexico policy can leave vulnerable people in unsafe conditions, including overcrowded shelters, out on the street or in high-crime areas.

Using the death penalty

At a recent campaign rally in Austin, Trump called for migrants who kill U.S. citizens to face execution.

“I’m hereby calling for the death penalty for any migrant that kills an American citizen or a law enforcement officer,” he said to applause Oct. 25.

Trump also pledged to invoke the Alien Enemies Act of 1798, which allows a president to apprehend and remove “alien enemies” during a war or foreign “invasion or predatory incursion” into the U.S.

“It gives you the power to target and dismantle every migrant criminal network operating on American soil,” Trump said. “If they come back into our country, it’s an automatic 10 years in jail with no possibility for parole.”