But whatever you are trying to say has no bearing on this issue of mandamus. As I stated a mandamus is a writ issued by a superior court commanding the performance of a specified official act or duty.
Congress is not a court, they could petition a court to issue the mandamus I suspect, but I'm not certain about that. But suing the DoJ, is probable not a wise avenue to even pursue. Do you think DoJ would provide a desired result?
Maybe they could sue in court as this is a Separation of Powers issue (I believe a court ordered Trump to turn over his tax returns by this same mechanism) - but this issue is effectively buried at least until next year which is the desired result. I think the only avenue Congress has is with the power of the purse or the enactment of law - which would have to be signed by the POTUS so it’s a non-starter even if it somehow did get pass the Senate.
But that doesn’t mean Trump can’t campaign on it. For openers “what are they trying to hide - first Hillary was bleaching her hard drives, now Biden is hiding his audio recordings” - of a transcript they already released, there should be no reason to bury the tapes unless the transcripts are forged, if the tapes reflect poorly on his ability to answer, or if he had someone reminding him of the answers. He’s got a legitimate beef here especially considering his Ukraine call transcript was illegally leaked. His advisors are going to jail for the same “crime” that the DOJ now says is a protected by Privilege. Biden gets to skate on his documents case while Trump is still facing a trial. And add that to the trials Trump has already faced and he’s got a strong campaign issue. There cannot be two types of justice.