Trump admin updates: US military is preparing for possible activation of National Guard in DC

Michigan Gov. Gretchen Whitmer, a Democrat, met with President Donald Trump Tuesday at the White House to discuss the impacts his tariffs are having on Michigan's economy and changes made to Medicaid, a spokesperson for the governor confirmed to ABC News.

"Today, I went to the White House to meet with President Trump. I told him and his team about the impact tariffs are having on Michigan's economy, especially our auto industry, the harm Michigan will face due to changes in the Medicaid program, and ongoing recovery efforts following the ice storm in Northern Michigan this year," Whitmer said in a statement to ABC News.

During the meeting, Whitmer made clear the negative impact Trump's tariffs are having on Michigan, given that the state's economy is tied to the auto industry, and tariffs have a disproportionate impact on this industry.

Whitmer, a Democrat, has met with Trump multiple times this year about addressing the needs of the state of Michigan. Whitmer last met with Trump in April in Michigan during an event at Selfridge Air National Guard Base.

-ABC News' Hannah Demissie

Ever the developer-in-chief, Trump made a surprise appearance on the White House roof above the briefing room, apparently inspecting future construction.

The media, which had been pushed significantly down the driveway, attempted to figure out what was going on.

"Mr. President, what are you doing up there?"

"Just taking a little walk," he shouted back.

"What are you building?"

"It goes with the ballroom, which is on the other side," he said.

Pressed again by reporters Trump replied "something beautiful” while pantomiming with his hands.

Trump said it was "Just more ways to spend my money," adding "Just more ways to spend my money for the country."

"Anything I do is financed by me," he stressed.

The president was accompanied by a small group of aides and Secret Service. The group included architect Jim McCrery, who has been commissioned to add Trump's ballroom to the White House. The two men appeared engaged in intense conversation as they surveyed the grounds -- with lots of animated pointing.

"What are you trying to build?" one reporter shouted.

"Missiles," Trump responded, presumably joking. "Nuclear missiles," he repeated while making the gesture of a rocket launching.

-ABC News’ Mary Bruce and Lalee Ibssa

When asked how exactly the U.S. is going to enforce the terms of the foreign trade deals to make sure these promised investments actually happen, President Donald Trump brushed off concern but noted that if they don't make the investments, their tariff rate will increase.

Well, then they pay tariffs for 35%," Trump said on CNBC Tuesday when asked what happens if the European Union investments don't happen.

Trump also insisted that the investments are not loans.

When asked about the details of what that $600 billion investment will go to, Trump said it will go to "anything" he wants.

"The details are $600 billion to invest in anything I want, anything I can do, anything I want, whether and the purpose was, they've been, you know, ripping us for so many years that it's time that they pay up, and they have to pay up," Trump said.

-ABC News' Michelle Stoddart

Trump revealed in a CNBC interview Tuesday that he was deciding between four people to replace Fed Chair Jerome Powell when his term finishes next May.

Trump indicated that two of the men on his list are named Kevin: Kevin Warsh, a current Fed Board governor, and the Director of the National Economic Council Kevin Hassett.

The president claimed Treasury Secretary Scott Bessent told him he didn't want to lead the Fed when Trump asked him.

He also celebrated the decision from Dr. Adriana Kugler, the Federal Reserve Governor, to resign on Friday, calling it a "pleasant surprise."

-ABC News' Lalee Ibssa and Michelle Stoddart