Pessimism from the Left:

In the view of Democratic data scientist David Shor, 2020 was the partyโ€™s last, best chance to win a Senate majority for the foreseeable future: Red-state incumbents Joe Manchin, Jon Tester, and Sherrod Brown held onto their seats in 2018 โ€” with the help of a historically Democratic national environment โ€” but are unlikely to be so lucky when they are on the ballot again in 2024. Thus, the partyโ€™s best hope was to eke out a majority in 2020, while it still had votes in unlikely places โ€“ and then, to use that majority to award statehood to Democratic leaning territories like D.C., Puerto Rico, and the Virgin Islands, thereby mitigating the coalitionโ€™s structural disadvantage.
On Tuesday, Democrats likely missed their shot. . . .
Extrapolate from current demographic trends, and Democrats donโ€™t take the Senate again until 2028 or later.