None. He lists two as toss-ups and a couple as only tilting Democrat. Three issues are apparently feeding the chance of Democrat pickups. The first is the tax bill and what the loss of the SALT deduction does to Republicans in Illinois, Pennsylvania, New York, California, and New Jersey. The second is the Pennsylvania redistricting. And the third are the large number of retirements removing any advantage an incumbent might have. On the other hand the election is over seven months away. A lot can happen in that time.
The fourth issue feeding the chance of Democrat pickups is that the GOP has so badly damaged their credibility as a political party that even many voters in their own base will stay home.