The problem with this plan is, electing an idiot for President doesn't automatically make every other person holding political office an idiot. And those people will still know how to get their agenda passed. Indeed, having an idiot as President, so long as he's their idiot, might even make it easier.
Trump's biggest "accomplishments" are the tax cut, deregulation, and putting conservative judges in federal courts. And all three of those just happen to be main planks of the standard GOP platform. It's a near certainly that Moscow Mitch doesn't give a crap that none of Trump's other agenda items have been successfully implemented.