Look, let's face it. The NON-GA deep south is safe republican now, and there's nothing anyone can do to reverse it - even GA relies on getting huge black turnout and support and probably consistently getting 28-30% of whites while holding down white turnout. It took a while for the downticket races to catch up with presidential trends due to famous family names, poor challengers, luck, and Bill Clinton, but they've caught up now and there's nothing anyone can do.
The rest of the non-GA/AZ republican states may go the same way - democrats should be very nervous about Tester, McCaskill, Heitkamp, and Donnelly. Manchin can hold his seat, but if he retires, its gone.
Clinton's numbers in MT also do not look good at all. Its the type of red state where Obama 2008 > Clinton (and ironically the Obama of today). Rehberg also made a lot of misteps and there was a vote split effect occuring. The one thing that bodes well for Tester is that the GOP has a limited bench of strong candidates.