Think about it. McConnell has created a toxic political environment wherein any nominee will be seen as politicizing the court. Filling the seat prior to the election will significantly undermine the public's trust in the court for decades. It will create further division in congress and among Americans. It will damage America itself.
A Judge must, by definition demonstrate good judgement. To accept a nomination at this time, knowing the damage that will be done if confirmed, demonstrates judgement so poor as to be disqualifying.