President Donald Trump, following the mass raid of a Hyundai plant in Georgia, proposed that foreign workers train Americans on “complex things,” but called on foreign companies investing in the United States to “respect” America’s immigration laws.

“Well, I’ll speak to them,” Trump told reporters when asked to respond to South Korea saying it was regrettable what happened to their workers.

“If you don't have people in this country, right now, that know about batteries, maybe we should help them along and let some people come in and train our people to do, you know, complex things, whether it’s battery manufacturing or computer manufacturing, or building chips."

“We have a lot of industries that we don't have anymore, and we’re gonna have to train people,” Trump added. “And the way you train people is bring people in that know what they’re doing, and let them stay for a little while and help.”

However, Trump said U.S. Immigration and Customs Enforcement was right to detain them, saying those workers have to come legally.

“At the same thing—time ICE was doing right because they were here illegally, but we do have to work something out where we bring in experts so that our people can be trained so they can do it themselves,” Trump said.

Less than an hour later, Trump took to social media to call on foreign companies to “respect” U.S. immigration laws, and reiterated his proposal that foreign workers train American ones.

“Following the Immigration Enforcement Operation on the Hyundai Battery Plant in Georgia, I am hereby calling on all Foreign Companies investing in the United States to please respect our Nation’s Immigration Laws,” Trump posted. “Your Investments are welcome, and we encourage you to LEGALLY bring your very smart people, with great technical talent, to build World Class products, and we will make it quickly and legally possible for you to do so.”

“What we ask in return is that you hire and train American Workers,” he added. “Together, we will all work hard to make our Nation not only productive, but closer in unity than ever before.”

-ABC News' Fritz Farrow

Trump is at the U.S. Open at Arthur Ashe Stadium in New York to watch the men’s final match between Jannik Sinner of Italy and Carlos Alcaraz of Spain.

Trump was met by cheers as he walked out of the and waved to the crowd and stepped back inside afterwards. The stadium was only about 20% full when Trump made an appearance.

Susie Wiles, Trump’s chief of staff, and Attorney General Pam Bondi were seen inside the box as well. The box is above center court and the championship trophy is inside.

Trump was adamant on Sunday that “we’re not going to war” with Chicago after he shared a post on Saturday with a caption that reads: “Chicago about to find out why it’s called the Department of WAR.”

“We’re not going to war. We’re going to clean up our cities,” Trump said. “We’re going to clear them up so they don’t kill every five people every weekend. That’s not war. That’s common sense.”

Asked why he’s targeting Chicago and Boston when there are cities in red states with higher crime rates like Memphis and St. Louis, Trump replied, “Excuse me, excuse me. Do you know how many people were killed in Chicago last weekend? Eight. Do you know how many were killed in Chicago the week before? Seven. Do you know how many people were wounded? Seventy-four people were wounded. You think there’s worse than that? I don’t think so.”

According to data from the FBI, Chicago and Boston have lower crime rates than cities in red states, including Memphis and St. Louis. The data shows that Chicago has 17.5 murders per 100,000 people and Boston has 3.6, while Memphis and St. Louis have murder rates of 40.6 and 54.1, respectively, per 100,000 people.

-ABC News’ Selina Wang

U.S. Immigration and Customs Enforcement (ICE) has launched an immigration enforcement operation in Boston, dubbed Patriot 2.0.

A DHS spokesperson told ABC News the operation is meant to target "the worst of the worst" in Massachusetts.

In May, DHS launched "Operation Patriot," which targeted Massachusetts and netted 1,500 arrests in a month, according to DHS.

The Boston operation comes as Chicago is bracing for a 30-day immigration crackdown surge.

-ABC News' Luke Barr

Trump signed an executive order implementing his trade deal with Japan, according to the White House.
The deal was reached in July but had to be finalized by both the U.S. and Japan.

“Under the Agreement, the United States will apply a baseline 15 percent tariff on nearly all Japanese imports entering the United States, alongside separate sector-specific treatment for automobiles and automobile parts; aerospace products; generic pharmaceuticals; and natural resources that are not naturally available or produced in the United States," the order says.

-ABC News' Hannah Demissie