Thanks, brain fart on the 60 vs 2/3, but it really only reinforces my point.
Do they have to though? Bringing Hunter down and implicating his dad in the process, will effectively end Biden's career and anything he has to say or put forward ever again. It'll be a lame duck presidency. No need to impeach Biden. He can be damaged beyond repair without impeachment. Then we'll see whether the DOJ is partisan or not. Will they investigate and charge him? I expect, if they get to close with Hunter, he may step down because of senility problems, which effectively stops him testifying or being culpable.
Just a thought, nothing to hang a hat on.