Breaking the trifecta for Democrats:
Breaking the trifecta is also possible for Democrats in Arizona, Iowa, and maybe Missouri.
Full control possibilities for Democrats:
Full control possibilities for Republicans: Alaska, Montana
Breaking the trifecta possibility for Republicans: Maine
Could go either way: North Carolina, New Hampshire
Also, Michigan will have divided government no matter what, but Democrats have a chance at the state House. Why it matters (for more reasons than the obvious):