Citing Donald Trumps massive unpopularity, CNN chief data analyst Harry Enten predicted Democrats will have a very good day in tomorrows elections, which include the highly charged New Jersey and Virginia gubernatorial races and the New York City mayoral election. I mean, look, Donald Trump is a huge, huge drag in all these races, Enten said. Look at his net popularity ratings in New Jersey. Hes 11 points underwater. Virginia, 14 points underwater. Not much of a big surprise in New York [City], hes 35 points underwater. And I will note nationally in my aggregate of polls, hes about 13 points underwater. And in our CNN poll, hes way below that, which looks a lot like New Jersey, a lot like Virginia. Related This is how its done! Mamdanis Fox News appearance praised as model for Democrats He said the results of these races could be huge bellwethers for midterm elections next year and how the president will impact them. He is a huge, huge drag across the board, Enten emphasized again.The likely Democratic victories tomorrow are significant, he explained, because in the past ninety years, when Democrats sweep the New York City mayor, the New Jersey governor, and the Virginia governor, they have won the U.S. House five out of five times.And when were in this national polarized environment and Donald Trump is as unpopular as he is, I think that history is likely to hold, Enten said. If, in fact, Democrats do sweep tomorrow, which at this point looks more likely than not.