“if he wins you’ll get lots and lots more nominees just like him year after year”
This is the logical fallacy.
Letting a leftist Democrat pro-Abortionist win in Kentucky will not make it better for conservatives in future primaries.
Neither will shoring up the establishment RINO country club wing of the Republican party. People around the country continue to tear up their Republican voter registration cards every time idiots like McConnell appear on the news and side with Democrats or fail to take easy steps to advance the conservative cause. So re-elect him and look for six more years of disappointment and destruction of what it means to be Republican. These guys are killing the GOP base.