President Donald Trump is marking Memorial Day at Arlington National Cemetery on Monday.

During an overcast morning, Trump took part in the traditional wreath-laying ceremony at the Tomb of the Unknowns.

He was joined by Vice President JD Vance, Defense Secretary Pete Hegseth and Commanding General of U.S. Military District of Washington MG Trevor Bredenkamp. All four men raised their hands in salute.

Also in attendance were Joint Chiefs Chairman John Daniel Caine, Director of National Intelligence Tulsi Gabbard, Veteran Affairs Secretary Doug Collins and other Trump officials.

Trump will deliver remarks at Memorial Amphitheater, in which he will pay tribute to those who died in America's wars.

The president earlier Monday had posted to his conservative social media platform a generic message in all-capital letters commemorating the holiday.

In a second Memorial Day social media post, Trump focused largely on lashing out at federal judges and perceived political opponents. It contained no mention of U.S. military personnel who lost their lives while serving in the armed forces.

Trump wished a happy holiday to all -- including "the scum" he said "spent the last four years trying to destroy our country through warped radical left minds."

The rest of the post criticized the previous administration on border security, and hit out at judges who've blocked parts of Trump's immigration agenda.

ABC News' Kelsey Walsh contributed to this report.