If the Democrat wins this, it is bad news for Trump.  If the Democrat wins this and keeps it in 2018, it is bad news for the GOP as a whole.   A close GOP win is better news for Trump, but it is not good and a bigger win is good news for the local GOP.  Southern races have their own dynamic, although I have not heard that abortion has been an issue.  Until the Dems get more detailed with the voters on why the pro-life movement is a scam, they will lose votes on this.  There is no going back on gay marriage, so this issue will fade with importance.  Suburban Atlanta is a bit less racist than much of Georgia still is, which is why we are even talking about this race repudiating Trump.