Of an a.m. annihilation announcement (an American Sentence)

Has it dawned on you yet that he’s become unhinged in his twilight years?
© Marie Elena Good 2026
Written for Robert Lee Brewer’s April Poem-a-Day challenge. Today’s prompt is to write a dawn and/or dusk poem.
Allen Ginsberg created the poetic form he called the American Sentence. It is a complete sentence of 17 syllables.