You are advocating surrender to the progressive left. A liberal is a liberal. McConnell votes one way but behind the scenes he is busy at work undermining conservatives as much as possible. Why would he suddenly change his ways as majority leader and work against his friends across the aisle.
Do not cut off your nose to spite your face. The enemy is Obama. Obama wants McConnell to lose.
The Enemy of your Enemy is your friend. Take care of your enemies one enemy at a time. Rank them. Obama is our worst enemy. He comes first, in any smart strategy.