Overpromise? FWIW, from what I can tell, the voters of NO and LA didn't demand maybes let alone promises. The pols ought to be run out of town on a rail, but I'm having a harder and harder time drumming up sympathy for the folks who elected these expletives-deleted. What the heck were they thinking?!
OTOH, making promises does curry favor with the voters, and does translate into winning elections.