What Michigan district are Republicans losing due to lack of signatures? I believe that all 9 GOP incumbents are running for reelection in GOP-leaning seats, and the one incumbent who may (and hopefully will) lose in the GOP primary, moderate Fred Upton of MI-06, would be replaced by conservative Republican Jack Hoogendyk, who also would win the general.
And as for the TX-14, that’s not a seat the GOP would be picking up; it’s merely one that it would hold.
I just say a post about what you were referring to—McCotter may not have gotten enough sigs for the primary ballot due to a large number of duplicates. But I think he’d win the primary running as a write-in, and would be a slam dunk in November.