Ugh, Morning Joe is awful, Tres.
No offense, but we won without disgruntled Republicans before, and we can do it again. You notice you never see Republicans worry one bit if a handful of Democrats vote for them. Nope, they worry about their base and what they want. They recognize they can't be all things to all people, and that's been a winning attitude for them since the 80's with Reagan and latter in congressional races with Gingrich.
Trump is an extremist and has a million unpopular policies. It's not rocket science to beat him, unless you make it into that by overthinking what he's going to say about you to paint you as a left-wing extremist, instead of you thinking about what you're going to say about him to paint him as a right-wing extremist.
The debates are a privilege, not a right. It's common sense for the DNC to create ground rules for who is worthy of a stage and when, or else we'll have two debate nights until March, and that IS a situation that helps Trump win.