I think you are exactly right and I think many in the house and the senate expect it to play out as you have described. I have been saying as much for months. I don’t believe that Trump overtly was demanding a quid-pro-quo and I don’t believe he was targeting biden for political reasons. But It would have malpractice to not have at least explore ways of how to uncover the corruption going on in the Ukraine on our dime. bolton is obviously butt hurt and would damage Trump if given the chance. I would not be surprised if bolton has already told many in congress that he is willing to say what they need to convict Trump. But as many here on FR keep telling me, I’m just a troll.
The Democrats never subpoenaed Bolton.
"The House committee requested Bolton's testimony, but he declined to appear voluntarily. The committee then made a strategic decision not to issue a subpoena demanding that he appear. The stated reason was that the action would be a futile one; Bolton wouldn't comply, and the House would have to take him to court (as it did with McGahn) to compel him to do so, and that could take months and months to wind its way through the courts."