538 has launched their senate model... pardon me while I geek out for a moment!
https://projects.fivethirtyeight.com...recast/senate/
The model gives the Dems a 58% chance of winning the senate.
Here is how they rate the the close races for GOP seats:
AZ - 78% chance of flip from GOP to Dem
CO - 68% chance of flip from GOP to Dem
NC - 62% chance of flip from GOP to Dem
ME - 53% chance of flip from GOP to Dem
IO - 41% chance of flip from GOP to Dem
MT - 32% chance of flip from GOP to Dem
GA - 26% chance of flip from GOP to Dem
KS - 22% chance of flip from GOP to Dem
GA (sp) - 17% chance of flip from GOP to Dem
SC - 15% chance of flip from GOP to Dem
AK - 13% chance of flip from GOP to Dem
TX - 11% chance of flip from GOP to Dem
KY - 4% chance of flip from GOP to Dem
And the Dem seats in some trouble:
AL - 72% chance of flip from Dem to GOP
MI - 19% chance of flip from Dem to GOP
MN - 8% chance of flip from Dem to GOP
NM - 5% chance of flip from Dem to GOP