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...
The banality of Trump/GOP evil...
"When I asked a Tennessee political observer why Alexander was incapable of doing the right thing, knowing that he wouldn’t face the wrath of the voters, he told me that every time Alexander attended a local GOP event or even something as anodyne as a Rotary Club meeting, he’d be reminded that he sided with the Democrats against Trump. Why, he suggested, would Alexander want the aggravation?"
See esp. the last para.