It is very interesting that while this race has definitely tightened, Tillis still has not led in any recent polls. The last poll I have with a Tillis lead was a Gravis poll back in June.
Tbf I'm pretty sure Tillis never led in 2014 either. Of course he was not the incumbent then.
He actually led in a handful of polls, even took a small lead in the aggregate during the summer.
Polls went back and forth with Hagan leading in more polls than not. Though, when you consider NC's partisanship, the tilt of the year, and the fact that incumbents tend to do worse in competative races than polls suggests, it's not suprize she lost. 2020 is shaping up to a D wave year of sorts where Biden is the favorite in NC and Tillis the incumbent