Republicans fall in line and turn out just to spite Dems / minorities / SJWs, whatever the case may be. Pick an issue that is more "liberal" / "progressive" and I can give you the exact way in which Republicans would weaponize it to energize their base to play spoiler to a demographic they dislike.
The ONLY issue where there is even a calculus to be done in terms of moving left at this point is economic policy with respect to tax reform. And this only works in areas where there are enough broke, working class white people whose situations are dire enough that they would stomach minorities receiving more $$$ if it meant they got some help too.
There is NO WAY running to the left would have helped Ossoff in this election. Going to the left energizes the Republicac base and increases their turnout. There's no way any lift in turn out for Ossoff as a result of going left would have offset the increased Republicac turnout that would have resulted. The 6th district does not have nearly enough poor white people who would see obvious benefits from economic reform, and even if it did, it's still in Georgia. These are the caciest of cacs, and thinking they're the same cacs as the ones in Michigan, Pennsylvania or wherever is folly.