I've been thinking this for a while now. Nothing gets people more excited than a celebrity, and Trump is proof of that. Dems definitely need to fight back with a classically "alpha" seeming white male celebrity to fight back.
While I highly disagree with the concept of turning the office of president into even more of a joke by purposefully electing more celebrities, someone like Nick Offerman or Robert Downey Jr. Would easily be able to defeat just about any Republican candidate just on popularity alone.