Source
Some people not attending/speaking the convention, or who are being vague about intentions to attend/speak:
- Trey Gowdy
- Sean Duffy
- Mark Sanford
- Carlos Curbelo
- Kelly Ayotte
- Bruce Rauner
- Lindsey Graham
- Nikki Haley
- John Cornyn
- Elise Stefanik
- Richard Hudson
- Mia Love
- John Kasich
- Rob Portman
- Roger Wicker
- Greg Walden
The list of those planning to skip out on the convention is far longer than that, with several of the skippers being mentioned in the #NeverTrump thread:
https://uselectionatlas.org/FORUM/index.php?topic=230807.0In addition to the names you listed, my understanding is that at least the following folks have either ruled out attending the convention or are leaning against it:
Ayotte
Baker
Kirk
Blunt
McCain
Johnson
Moran
Burr
Murkowski
Romney
Flake
Gregg
Sandoval
Hogan
Mead
Deal
all the Bushes
Duncan Hunter is one of the few people to endorse Trump during the primaries, and yet he says he probably won’t go.
Many politicians who are delegates themselves, like Rand Paul, say they’re undecided about going.
While Rubio hasn’t said he’ll skip out, he has said that he won’t speak at the convention if it means having to give a speech in support of Trump.
Cruz is presumably going, but Trump says he won’t let him speak unless he gets an endorsement out of him:
http://thehill.com/blogs/ballot-box/presidential-races/284956-trump-wont-invite-cruz-kasich-to-speak-at-conventionAnd then you have folks like Gordon Humphrey, who are specifically going to the convention in order to sabotage Trump’s nomination.