(sigh) I'm surprised at you.
In the first place, if the House wanted to reveal "hidden truths," the time was during the House Impeachment Investigation. For example, if they really believed either Bolton or anyone else had some important evidence, then they should have forced the issue in the Court. Recall, both the Nixon effort and the Clinton Impeachment process each took years, not months.
In the second place, IMO even if Bolton is speaking absolute truth, i.e. aid was contingent on Ukraine investigating Biden, where is the proof the design was to influence the election as opposed to simply investigating corruption? In other words, your are presuming "bad motive" based on your personal bias against Trump, when Trump is pretty open about most of his motives especially when it comes to foreign aid.
Meanwhile, it is also (IMHO) hypocritical to dismiss real issues (raised back when Biden was VP) of both corruption and conflict of interest which led to an openly bragged about "quid or quo," while at the same time condemning Trump for alleged corrupt purpose "quid pro quo."
I personally don't see his actions designed to "influence the election" as more to satisfy his own concerns about both "CrowdStrike," and Biden/Burisma corruption. Also, why should Biden be "immune" when Trump himself wasn't back in 2015/16?