To best assess the execrable essence of Mitch McConnell, you just need to connect the dots. After the MAGA insurrection on Jan. 6, after the dead and the injured and the feces smeared on walls, McConnell tore into Donald Trump. He said, “The mob was fed lies. They were provoked by the president” who was guilty of “a disgraceful dereliction of duty.” But when the time came to convict Trump during the impeachment trial, McConnell – and other Senate Republicans who followed his lead – voted to acquit. McConnell’s excuse: “We have a criminal justice system in this country… And former presidents ar…