I really think people are overestimating the chances that GOP primary voters are going to keep nominating Trump-like candidates. It's very possible that the party goes back to nominating more "normal" candidates in 2020. In which case, this effort to split off and form a non-Trump conservative party would be rather pointless.
This. These same folks nominated Romney. The GOP primary electorate has barely changed since 2012, and the main way it did was a bunch of people who didn't normally vote showing up to vote SPECIFICALLY FOR TRUMP, and - as I have detailed before - their various reasons were hardly the making of a coherent (much less lasting) ideology.
"Trumpist" doesn't mean anything.
Except for when it does. Just like everything else around here these days.