Can’t even call this the law of unintended consequences. It was all foreseen, oh except for that part about the savaged deplorable rising up and electing Trump.
In 2018, 35 Senate seats are in play - 26 Dem, and 9 GOP
In 2020, 31 Senate seats are in play - 11 Dem, and 20 GOP
(MN and MS are filled by Special Elections this cycle)
in 2022, 34 Senate seats are in play - 12 Dem, and 22 GOP
The tough defense the Dems have this cycle will be borne by the RNC for the next 2 cycles.