"Support my Republican opponent and you will be expelled from the GOP."
That is one messed up dude.
"Support my Republican opponent and you will be expelled from the GOP."
Jim Gilchrist is not a Republican.
The one who threatens should himself be expelled from positions of leadership.
Most local party committees have clear rules that if you support a non-party candidate against a party candidate, you will be removed from the party committee.
Gilchrist did not join the republican party, so republicans in the committee cannot support him without first resigning from the party.
It is a pretty good rule. You don't quit "the party", you quit the committee, which by charter exists to elect people of the party, not the people who best represent conservative views.