Righties would be wise not to get too excited. Especially not Trumpists. Pretty much the only things you've got right now are (1) that historically the President's party doesn't do so well in midterms, (2) temporary upset about how Afghanistan played out. And yet the non-Trumpist right seems to have done a much better job of being honest about the narrow slice of Afghanistan that might conceivably be blamed on Biden
and about the difficulty of doing it any better with less than 13 more dead soldiers.
(Got the slightest clue how many it would take to secure Kabul, a city of about 4.5 million people? Know how many more would die if they were spread as targets all around? Nevermind the question of "hold on...how fair is it to blame Biden for not getting every single American out; wtf were they doing still sitting there with their thumbs up their asses?" It's only the interpreters and people who helped us where proper blame lies, and that blame almost entirely lies on the Bush, Obama, and Trump)
But you also have an incredibly significant negative not usually there: Trump's influence.
All those things that made a sufficient amount of people strongly anti-Trump to vote Biden are still there. Yet, Trump's primary picks don't seem to be doing well anymore. So you may have some gains in non-Trumpists GOP politicians - they did better than Trump in 2020 as it is - but you're still going to be running a whole bunch of Trumpist bastard scumbags.
Being pissed at Biden over Afghanistan is not going to cause someone who chose not to vote for Trump to vote for a Trumpist congressman in 2022. That doesn't compute.
Meanwhile, Dems have needed infrastructure bills cooking and unless they manage to snatch defeat from the jaws of victory by torpedoing both (hello Manchin; hello super-progressives), that's going to have them riding high for a while.
Because we actually
need massive infrastructure work, and you know it.