If he followed the law he couldn't.
The Posse Comitatus Act is a United States federal law (18 U.S.C. § 1385, original at 20 Stat. 152) signed on June 18, 1878, by President Rutherford B. Hayes that limits the powers of the federal government in the use of federal military personnel to enforce domestic policies within the United States.
However, Trump has over 13,000 Truth Social posts from January 1, 2023 to April 1, 2024, where Trump has vowed at least 19 times to weaponize law enforcement against civilians. This includes deploying state and local police, multiple branches of the military and federal law enforcement agents from the Drug Enforcement Agency, Bureau of Alcohol, Tobacco, and Firearms, FBI and Homeland Security agencies against people crossing the southern border, homeless people and protestors.
And let's not forget the Constitution itself.
Trump calls for the termination of the Constitution in Truth Social post