Don’t forget that McConnell called for a write in vote, the write ins were 1.5%.
What the Dems and GOPe got in this off year election exceeded their 2014 Alabama mid-term by 244,000 for their Dem governor candidate. That’s highly unusual.
https://en.wikipedia.org/wiki/Alabama_gubernatorial_election,_2014
As they say if it’s not close they can’t steal it. There probably was enough institutional fraud from the Dem areas to squeak by with a win.