President Donald Trump kicked off Memorial Day with a fiery online rant targeting political enemies before heading to Arlington National Cemetery to honor America's fallen service members.

Trump started the holiday Monday with a Truth Social post blasting "Dumocrats, RINOS, and Fools" criticizing his administration's ongoing negotiations with Iran.

"Happy Memorial Day to all, including the Dumocrats, who disrespect our Military," Trump wrote, while also praising members of the armed forces and honoring Americans who "made the ultimate sacrifice."

The President also mocked critics of the possible Iran deal, calling them "losers" and insisting any agreement would be far stronger than the Obama-era nuclear deal he scrapped during his first term.

Later in the day, Trump appeared alongside Vice President J.D. Vance and Defense Secretary Pete Hegseth at Arlington National Cemetery for a wreath laying ceremony at the Tomb of the Unknown Soldier.

Trump stepped forward alone to place the wreath at the historic site, which contains the remains of unidentified American soldiers who passed away in World War I, World War II, and the Korean War.

The Memorial Day ceremony came as Trump spent much of the weekend focused on possible negotiations with Iran, which he cited as a reason he would be unable to attend his son Don Jr.'s wedding on Saturday ... with reports suggesting his administration is working toward a potential agreement.