The President was right to bring up the Biden's apparent corruption with his fellow President. I too would like to see them look into it, I would like our US Attorneys to look into it ias well.
Now, even though the House impeachment managers are arguing about Biden corruption allegations in their Senate presentation, the two leaders of the House impeachment inquiry, Bug-eyed Schiff and Fat Jerry, took the position that Republican claims about the Bidens were irrelevant — a partisan red herring to distract from the “real” issues. They steadfastly refused to permit witnesses on that topic (including the Bidens themselves).
Moreover, the president was denied the right to have his counsel participate in the main investigative phase, run by Bug-eyed Schiff. So, even though Bug-eyed Schiff began the House hearings with an absurd parody version of the Trump–Zelensky conversation, falsely suggesting that Trump had asked Zelensky to “make up dirt” about Biden, the House denied the president the opportunity to prove that he was actually asking for help investigating activity that, objectively, appears quite suspicious and potentially corrupt.
It is a much different scenario if there was a real basis to believe the Bidens’ conduct should be scrutinized. Joe Biden is not immune from investigation just because he is running for president — certainly no more than the president himself is immune (which, obviously, he’s not).
The president has to be given an opportunity to prove his rebuttal case. A trial is not a trial, not in the American tradition, if prosecutors are permitted to level a serious accusation and then deny the accused the right to mount a defense.
Trump Impeachment Trial: Democrats’ Burisma Bait and Switch | National Review