The Georgia race is the most heavily advertised race on TV I have ever seen in my life (be in President or Congress). Over HALF of all the ads on the main local TV stations are for this one race. Democrats have funded it VERY well, as even with 17 candidates, one is close to half the ads.
Interestingly, the many GOP interests are not only running anti-Democrat ads but they are attacking each other. NO candidate in either party says anything good about Trump.
Non-candidate PACS are also running ads, interestingly a number of which are PRO-Obamacare. Besides the parties and normal liberal and conservative PACS, folks like the AARP are even running ads.
The key question, as you have to get 50% in Georgia to avoid a runoff is whether Osoff gets up from the 45% where he sits in the polls now to 50%. No one else is past the teens. And if he doesn't, will moderate and conservative Republicans agree on the number two vote-getter.