The left functionality doesn't exist in this country. We stamped them out in the Cold War and replaced them with the new Democrats who were all for social progressivism but economically were beholden to corporate interests. Then you have the conservatives who are so socially regressive they think Sharia Law is a roadmap and are so in bed with corporate interests that they'd be fine if kids died in coal mines as long as someone at the top is getting paid.
We can't have the true left back until we get voting reform. Ranked choice or approval voting is essential to allow 3rd parties to have a chance to flourish without causing a spoiler effect. That will also pull the Overton window back to the left again as the two major political parties will have less of an incentive to court extremists and will see better results at the polls if their platforms appeal to as many people as possible.
I think this is unironically how they need to spin it. Convince the Republican base that this ruling is actually better for Biden than it is for Trump by repeating their own false narratives back to them - that the Biden Crime Family will get away with everything. Albeit, the things he could actually get away with are limited to what the court determines is an official act, and given the current makeup of the SCOTUS it's unlikely that they would side with him even if there were precedent, but he would be still almost untouchable under this new ruling no matter how you spin it.
Have a case against Joe Biden? Sorry, all of that evidence is now inadmissible in a court of law because it happened while he was president. Too bad, Republicans! Maybe if you were to... I dunno, pass a constitutional amendment that revoked that privilege. But oooooh nooooo, that would be horrible! Please, anything but that! All our nefarious plots would be undone and Biden would go to prison!