The NRSC has been running ads hitting democratic senate candidates on supporting the Iran Deal in a number of states: The battlegrounds of North Carolina, Florida, Arizona, Nevada, New Hampshire and Pennsylvania, but also the (probably) non-battlegrounds of Wisconsin, Illinois, and Georgia.
Here's one of the ads: https://www.youtube.com/watch?v=ez4wJxwBB_0
Wisconsin I get because they always like to fantasize about winning it. But Illinois and Georgia? Hmmm.....
Also, on the battlegrounds, I would swap East Vermont (which is Safe D) and Wisconsin (which is tightening).