This is what Trump should nail Slotkin with:

U.S. Codes
Chapter 439

TITLE I
Secti on 1. (a) It shall be unlawful for any person, with intent to
interfere with, impair, or influence the loyalty, morale, or discipline
of the military or naval forces of the United States—
(1) to advise, counsel, urge, or in any manner cause insubordina-
tion, disloyalty, mutiny, or refusal of duty by any member of the
military or naval forces of the United States; or
(2) to distribute any written or printed matter which advises,
counsels, or urges insubordination, disloyalty, mutiny, or refusal of
duty by any member of the military or naval forces of the United
States.
(b) For the purposes of this section, the term “military or naval
forces of the United States” includes the Army of the United States,
as defined in section 1 of the National Defense Act of June 3, 1916,
as amended (48 Stat. 153; U. S. C., title 10, sec. 2), the Navy, Marine
Corps, Coast Guard, Naval Reserve, and Marine Corps Reserve of the
United States; and, when any merchant vessel is commissioned in the
Navy or is in the service of the Army or the Navy, includes the master,
officers, and crew of such vessel.
Sec . 5. (a) Any person who violates any of the provisions of this
title shall, upon conviction thereof, be fined not more than $10,000 or
imprisoned for not more than ten years, or both.


Loyalty and Morale should be the main focus.

There are plenty of servicemen who would gladly testify about being negatively influenced...

Convict them and put them behind bars for a year along with nine years of probation.