According to the article in the following link, Rand Paul is threatening to force a vote on calling Hunter Biden if the Dems win the vote to call John Bolton.
Your criticism of Senator Paul is off the mark.
The problem is that 95 Senators want to hear John Bolton (and you can bet they've all been told EXACTLY what he is going to say), ZERO Senators want to hear Hunter Biden (because they are terrified of what he might say).