Meh.
Walker relied on the Iowa GOP establishment like Gov. Branstad and Sen. Ernst instead of campaigning in person. His dropping out has zero to do with anything Iowa.
Either he was a GOP-E stealth candidate who was told to drop out, or he’s a conservative following FR advice and opting out early because he realized he wasn’t the strongest candidate.
I live in eastern Iowa.
Walker was not well liked. He didn’t protect his people when the “John Doe” SWATing started. Many of them fled to Iowa.
I suspect Trump will take Iowa for the GOP, and Sanders for the Dems.