Green Day's frontman Billie Joe Armstrong would rather talk about the Kardashians than politics ... until you push his Donald Trump button, that is.
We got Billie in WeHo and tried throwing him a political fastball. He fouled it off, and asked for a Kardashian softball instead.
But when he got the Trump question he wanted -- on whether his supporters would rally if The Donald should lose this race -- Billie swung for the fences.
Check out the clip -- he thinks we should keep an eye on a little something called Trump TV ... which he thinks is for one type of audience.