Purely FYI as a side bar but still releveant to the discussion imho.
I didnt say a word about the UCMJ Duncan. But them the UCMJ isnt the only authority of reference in these matters.
I am however refering directly to Federal Law (Titles 10, 2, and 18,) and, Department of Defense (DOD) Directives, not to mention all the specific military regulations which strictly limit a military active duty person's participation in partisan political activities as well as clearly spell out recomended punnishments for appropriate actions rangeing from reprimand to Article 15 and or court martial proceedings if nessesary.
At least as it was explained to me by military legal layman like my husband who is active duty AF and the very nice retired Lt Col in charge of the rotc program at my college.