no, i think this is a good idea. it costs nothing and signals moderation.

Depends on who. Kasich and the ghost of Bill Weld aren't enough. Now, Mitt?

Who is left in the Republican party with some level of sanity to invite, though?

Eh. I just want one thing for my party that is about my party, not about being the bigger person, adult in the room or whatever

It's gonna make Trump furious, and when Trump is furious he tends to do like six or seven stupid things in quick succession. We're not going to have many more high-profile, high-coverage opportunities to trick him into dropping himself in the polls.

They have Ana Navarro as one of the hosts, and I think that's good enough. Having a never-Trump conservative in that kind of position is a good signal that the Dems are still a big tent, but without giving them a speaking platform to define the party's policies.

it’s also a time-honored tradition in american politics, see zell miller speaking at the 2004 republican convention

And lets Kinzinger and whoever else rip into Trump for a whole speech, which might be seen as overkill for a Dem