Why? Because everything that can possibly happen, anything of any sort, will dampen the Red Wave. Why is that? Because Democrats are unorganized, weak, lack knowledge about how the electoral process works, and more self centered than ideology centered. Not all Democrats, but plenty of them.
But that’s just me talking. All I have to offer is experience in campaigns since the 1970s. What you really want to do is listen to Rachel Maddow, who has a whole staff and a big brain. She says different. I hope she is right and I am wrong. (For the record, we rarely disagree.)