President Donald Trump addressed judicial nominations while speaking with reporters aboard Air Force One on Sunday evening, saying, "Well, we're putting them in rapidly. We're trying to get very good ones."

"We need judges that are not going to be demanding trials for every single illegal immigrant. We have millions of people that have come in here illegally, and we can't have a trial for every single person. That would be millions of trials," the president said of the administration's sweeping deportations.

Trump said his overhaul of U.S. immigration policies was "the No. 1 issue" he campaigned on, claiming "radicalized" judges are delaying that process.

"So, they come into our country illegally, and then we're supposed to take weeks, I guess, and months to have a trial on every criminal that we have, murderers all over the country. I don't think the Supreme Court will stand for that. I can't believe it, because, you know what, if they do, we're not going to have a country," Trump claimed.

-ABC News' Fritz Farrow

While speaking with reporters aboard Air Force One on Sunday evening, President Donald Trump said he's considering tapping White House Deputy Chief of Staff Stephen Miller to be the next national security adviser.

“Stephen Miller's at the top of the totem pole,” Trump said. "I mean, I think he sort of, indirectly, already has that job, you understand, because he has a lot to say about a lot of things. He's a very valued person in the administration, Stephen.”

Trump also defended his decision to remove Mike Waltz from the role and nominate him to be the U.S. ambassador to the U.N.

"I actually think it's a higher position, if you want to know the truth," Trump said of Waltz's new nomination. "I think it's an upgrade."

Trump said his official nomination for the next national security adviser would come "within six months."

-ABC News' Fritz Farrow

President Donald Trump is taking aim at the film industry, saying in a post on Truth Social on Sunday that he is instituting a 100% tariff on all movies produced overseas.

The president claimed that other countries' "concerted effort" to offer incentives to draw American filmmakers and film studios internationally is a national security threat.

"Hollywood, and many other areas within the U.S.A., are being devastated. This is a concerted effort by other Nations and, therefore, a National Security threat," Trump wrote.

The president said he's authorizing the Department of Commerce and the United States Trade Representative to immediately begin the process of instituting a 100% tariff on "any and all Movies coming into our Country that are produced in Foreign Lands."

-ABC News' Fritz Farrow

President Donald Trump said in a post to Truth Social on Sunday that he is ordering the Bureau of Prisons to reopen and expand the famed Alcatraz Island prison, which lies off the coast of San Francisco, "to house America's most ruthless and violent Offenders."

"We will no longer be held hostage to criminals, thugs, and Judges that are afraid to do their job and allow us to remove criminals, who came into our Country illegally," Trump wrote.

Alcatraz Federal Penitentiary closed in 1963 after nearly 30 years in operation primarily due to high operating costs and the deteriorating condition of the facility, according to the Bureau of Prisons.

It has operated as a museum since 1973 and has become one of the most popular Park Service sites, with over a million visitors each year, according to the Bureau of Prisons.

-ABC News' Fritz Farrow

Though he has teased seeking a third term in 2028 despite the Constitution barring it, Trump on Sunday ruled out another run, saying his current four-year term will be his last.

“But this is not something I'm looking to do. I'm looking to have four great years and turn it over to somebody, ideally a great Republican, a great Republican, to carry it forward. But I think we're going to have four years, and I think four years is plenty of time to do something really spectacular,” Trump told NBC’s “Meet the Press.”

“I just want to serve, do a great job,” he later added. “I’ll be an eight-year president. I’ll be a two-term president. I always thought that was important to be honest with you.”

The president pointed to Vice President JD Vance and Secretary of State and interim national security adviser Marco Rubio as possible successors, and said, when asked, that he believes his MAGA movement can survive without him.

-ABC News’ Fritz Farrow