In case anyone is unfamiliar with Larry Sabato, let me just say that he is a political analyst–much in the mold of Charlie Cook, Scott Rasmussen, and Stu Rothenberg.
I receive his newsletter every week.
It is my understanding that, in his personal life, he leans center-left. But he never allows his personal opinions to show through, in his newsletter. He is a serious analyst–not a partisan hack.
Anyway, in his most recent newsletter, he suggests that the GOP is likely to retain the Senate in 2020–despite the fact that almost twice as many Republican seats as Democratic seats are up for re-election–and he goes into the reasons as to why that is the case.
Here is a link to his newsletter: https://connect.xfinity.com/appsuite/#!!&app=io.ox/mail&folder=default0/INBOX