you’re right, they make an outlandish promise (build a wall, mexico to pay) and then blame the other side when it doesn’t happen. The agenda-setting aspect you’re mentioning is also something that caused everyone in the democratic party to snipe Bernie since his whole thing was talking about what must happen and not getting bogged down in the endless details (though I think he could have also done that at that level too).
Oh I may have been interested in helping them before, but since they’re sooo edgy I’m sure they can fuck themselves. I mean, fuck themselves. Help themselves. There it is. Also fuck them. :)