This Detroit Free Press article says that Michigan’s Republican Governor, Rick Snyder, and key Republican legislative leaders, refused to disavoy the idea that the Republican-majority legislature might pass a bill, letting each U.S. House district choose its own presidential elector. Thanks to Thomas Jones for the link.
The article should have mentioned that Michigan has a referendum process, and if such a bill passed, the Democratic Party of Michigan and its allies are capable to qualifying a referendum vote on the bill.