Defense Secretary Pete Hegseth is expected to testify before a House panel on Tuesday, his first time on Capitol Hill since being sworn in five months ago and as questions swirl about the deployment of troops to Los Angeles as part of an immigration crackdown.

Hegseth planned to appear before the House Appropriations Defense Subcommittee alongside Gen. Dan Caine, chairman of Joint Chiefs of Staff, and acting Pentagon Comptroller Bryn Woollacott MacDonnell to discuss the administration’s upcoming 2026 budget request.

During the hearing, Hegseth is widely expected to dodge many of the specifics on the military’s spending blueprint, which has not been released, and instead highlight recent gains in recruiting numbers and new technology initiatives in the Army.

But overshadowing much of his testimony will be the Pentagon’s decision to send some 4,800 troops, including 700 Marines, to Los Angeles following several days of clashes between protesters and law enforcement there. The troops, known as Task Force 51, are being called under a law known as Title 10, which allows the president to send military forces to protect federal property and personnel.

Gen. Eric Smith, commandant of the Marine Corps, is scheduled to testify separately Tuesday before the Senate Armed Services Committee.

On the eve of Hegseth’s testimony, Rep. Betty McCollum on Minnesota, the top Democrat on the House Defense Appropriations Subcommittee, accused President Donald Trump of deliberately escalating the situation in Los Angeles by pushing for military reinforcements not requested by California Democratic Gov. Gavin Newsom. She called decision to send Marines in particular “outrageous.”

“The active duty military has absolutely no legal role in domestic law enforcement. President Trump and Secretary Hegseth should read the Constitution and follow the law,” she said.

The Pentagon has not had a news conference since the deployment of troops to Los Angeles, referring reporters with questions about the mission to Hegseth’s posts on X.

On X, Hegseth said the troops were needed to protect federal immigration officers and detention buildings.

“There is plenty of room for peaceful protest, but ZERO tolerance for attacking federal agents who are doing their job. The National Guard, and Marines if need be, stand with ICE,” Hegseth said in a statement.

U.S. officials said the troops would carry guns and ammunition separately for use only in self-defense and to protect federal property. They would not patrol the streets or help law enforcement arrest protesters, the officials said.

Unclear is whether Trump is preparing to invoke the Insurrection Act, an 1807 law that says the president can call on a militia or the U.S. armed forces if there’s been “any insurrection, domestic violence, unlawful combination, or conspiracy” in a state that “opposes or obstructs the execution of the laws of the United States or impedes the course of justice under those laws.”

On his Truth Social platform on Sunday, Trump referred to the L.A. protesters as “violent, insurrectionist mobs” and “paid insurrectionists.”

When asked if Hegseth had spoken with Trump on Monday, Pentagon press secretary Kingsley Wilson told ABC News, “the Secretary is in regular contact with the President regarding the National Guard presence in Los Angeles.”

Following his testimony, Hegseth is expected to travel with the president to Fort Bragg in North Carolina on Tuesday to participate in activities tied to the Army’s 250th birthday celebration.

Under Hegseth, the military has taken over control of hundreds of miles along the U.S. southern border with Mexico in an effort to tamp down unauthorized entry by migrants. He’s also eliminated programs aimed at increasing diversity among military personnel, slashed the number of general officers and initiated efforts to build a $175 billion U.S. missile defense shield.

At the same time, Hegseth also faces reports of dysfunction and infighting among his personal staff at the Pentagon. Since his Jan. 25 swearing in, Hegseth has fired or sidelined several of his own top political advisers and he’s gone without a chief of staff since April.

Tuesday’s hearing also would be Hegseth’s first appearance since revelations that he relied on a commercial messaging app known as Signal to relay details about a pending military attack to other high-ranking officials and others, including his wife. Hegseth’s use of Signal is now under internal investigation by the Defense Department’s inspector general.

ABC’s Luis Martinez contributed to this report.