Respectfully, did you read and understand my reply? The seat is not vacant. You were snapping at the other reply saying it was and that it is obvious. But it is not. What can Beshear do then? He could of course say a certain individual is McConnell's replacement but so could you or I. It has no legal bearing.
All he can do, which he indicates in his letter, is ask the Senate to replace him.
Being angry at the wrong people also does nothing to better your situation.