Scorched Earth Time.
I think we need to consider two avenues of action.
1) a Leftist-style BOYCOTT of ALL businesses giving substantial support to the Chamber of Commerce.
2) A petition to PLEDGE that if there are any shenanigans, you will cast your vote for the DEMOCRAT in November, for the SOLE PURPOSE of PUNISHING the GOPe.
In many ways a democrat *is* preferable to a GOPe RINO turncoat. The enemy behind you is worse than the enemy in front of you.