I think that the Lt in question, since he is actively serving our country, should be able to say what he wants. He probably has more rights to it than I
That's just not the law (i., the UCMJ).
If the military decides whether it wants to serve the current leader or no, there's chaos. Look at all the third-world countries whose militaries continually overthrow their leader. The professionalim and loyalty of the officer corps is one of the reasons why we're different. Our officers follow their CinC...respecting the office even if they dislike the officeholder.