Senate Forecast from fivethirtyeight:
https://projects.fivethirtyeight.com...recast/senate/
If I'm reading this right the most likely outcome is 51 R, 49 D.
House Forecast:
https://projects.fivethirtyeight.com...orecast/house/
Most likely is 234 D, 201 R
Governors:
This is important because they can largely influence not only policy on a national level but also things like Gerrymandering.
https://projects.fivethirtyeight.com...cast/governor/
195 million people are likely to be governed by D, 134 million likely to be governed by R.