Well, lets start with This link shows which states originally opted out and which states have since opted in.
Governors in 2016:
Texas. Greg Abbott. R
Wyoming, Matt Mead, R
Alabama, Robert J. Bentley, R
Arizona, Doug Ducey, R (has since adopted.)
Arkansas, Asa Hutchinson R (has since adopted.)
Utah, Gary Herbert R (expected to expand in 2019 / 2020)
Idaho,Butch Otter, R (expected to expand in 2019 / 2020)
Nebraska, Pete Ricketts, R (expected to expand in 2019 / 2020)
Florida, Rick Scott, R
Kansas, Browback, R
Mississippi, Phil Bryant R
Missouri, Jay Nixon D
NC, Pat McCrory, R
Oklahoma, Mary Fallin R
Here is another handy dandy chart.
I’m exhausted and I have to go pick up kids from school, but the last 30 minutes of researching shows that virtually every state who initially refused to expand had a Republican governor, except for Missouri. Many of those states have since expanded or are considering expanding. Kansas is an example. We now have a Democrat for governor and she’s working on expanding.
Feel free to do your own research that shows I’m wrong @KNOWITALL.