When Trump left the White House, he took the most valuable gifts he received from foreign leaders and governments with him, instead of obeying the law and delivering those gifts to the State Department. Taking things worth over a $1000 is a crime punishable by a year or more in prison, if the perpetrator is prosecuted and convicted of the crime.
Some of the things he took that belong to all of us, citizens of the USA, can be seen in pictures of him at his desk in the Oval Office in the White House and at his desk at Mar-A-Lago. Mollie Haberman interviewed him at both places. She noted in her report that some of the items she had seen at the White House when Trump was President were now at Mar-A-Lago when he was no longer President.
Some of those knick-knacks Trump removed from the White House are worth thousands of dollars. You can’t buy them at your local dollar store. Why not prosecute him for that? He’ll claim “They all did it,” but no Presidents have taken gifts from foreign governments out of the White House — without reimbursing the federal government for the dollar value of the items in advance — in over 50 years, not even Nixon.