Iowa Democrat caucuses are also Monday night, but won’t have a presidential preference vote. That will be done mail-in. Hard core Dems will be fighting for their own precinct and county offices. Guessing numbers, I’d say it would take 15,000 to 30,000 Dems changing registration to influence the GOP outcome. I don’t believe they could get near that many.
In past years, Iowa has reported the number of changed registrations on caucus nights, so we’ll know.
Probably less than 1,000 donk changes statewide, and in places where Haley’s numbers are marginally better... College towns, etc. Overall DJT’s numbers may approach 70%