Arizona Sen. Ruben Gallego, a Marine Corps veteran, has expressed disgust at plans to honor participants in the Jan. 6 insurrection attempt.
The strike on a suspected Venezuelan drug-smuggling boat is raising questions about how far Trump will wield his presidential power over the military.
The visit comes more than a week after ships carrying hundreds of U.S. Marines deployed to Puerto Rico for a training exercise.
As Trump has dramatically stepped up his use of military force for his policy goals, fellow Republicans in Congress have done little but cheer him on.
