Dutch brought up an interesting point. Demos are 0-5 in special elections this year. Two thoughts:
#1 All of these districts were deep deep red districts. In fact, Price won the Georgia 6th in November by 20+ pts. Just 7 months later, Handel won it by 5? This has been true in all the other district races too. So clearly, Trump's unpopularity is taking its toll on these races. This leads one to theorize that in purple districts where the races are historically more competitive that Republicans will take it on the chin.
#2 0-5 for Demos does give Republicans a more reassuring feel that they might be able to prevent Demos from retaking the House in 2018. What these special elections have proven is that gerrymandering is a real problem. Despite the races becoming closer, being 5-0 means despite a 35 percent Republican president's approval rating leads to the question that "maybe policy and person just doesn't matter anymore?" Perhaps all that matters is your party's identity? Districts are appearing to become less competitive and despite some voters switching sides, there's already a strong enough Republican base that it really doesn't matter what happens, they'll always show up and vote Republican.
Karl Rove saw this in 2004. Traditionally candidates would start out extreme to gain the base of each party's support then pivot the opposite way in the generals to appeal to moderates. In 2004, Karl Rove predicted that Americans had become so polarized and so identified one way or another, that George W Bush didn't need to pivot left to attract moderates in the general. Instead, he kept pandering to high far right base.
Now what this means today? Less moderation and a continuing slippery slope to extremes.
For those of you looking to read up more on this:
https://fivethirtyeight.com/features/georgia-6-is-all-about-the-voters-who-reluctantly-backed-trump/