There are some Republican voters that don't want to vote for #Trump - Hailey voters that are on the fence. Here is where Gen. Kelly's statements will help.
This presupposes 1) the existence of a non-MAGA GOP and 2) that if existing, said group's numbers are significant. It's not out of the realm of possibility.
Presuming that said category above also contains the purported "stealth Harris R voters" -- the ones who pay lip service to Herr Dumpkopf at work, church, the fam BBQ, etc so as not to jeopardize personal/professional relations but in private detest DJT and in the booth vote against him. I still think the numbers are small...
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The numbers are small, but the pres. race is always about winning the tight swing states.