Who do you think got Thad Cochran back in the Senate?
I guess that means you don’t know who votes on the rules?
It’s the delegates. Which, in any competent campaign, consists largely of supporters of the major candidates.
If you really think the delegates of a candidate who has majority support are going to change the rules so that a majority is no longer sufficient, then you are beyond reasoning with.
Haley Barbour, Trent Lott, Mitch McConnell, John Cornyn, and their ilk and the stupidity of “open primaries” allowing non-Republicans to vote in GOP primaries got Cockroach “re-nominated” which was tantamount to re-election. That’s who.