The Chicago Tribune published an editorial today going after McCain for his relationship with Gordon Liddy.  The Tribune calls McCain a hypocrite for not fully revealing his relationship with Liddy:

This leads us to some inescapable conclusions. The first is that McCain lied when he promised to lay out his relationship with Liddy. The second is that he is hypocritical in demanding something of Obama that he won't do himself. The third is that he is scared to tell Americans the truth because they won't like what they hear.

Although Liddy only was convicted of burglary and wire-tapping, the article lays out some of the more serious plans that were considered:

He proposed to do still more--bomb the liberal Brookings Institution, kidnap anti-war activists and murder a couple of inconvenient people. But cooler heads prevailed.

And the article calls McCain on his claim that Liddy paid his debt:

Actually, most of the debt was forgiven by President Jimmy Carter, who commuted his sentence. McCain doesn't mention that, like Ayers, Liddy has never repented of his crimes, but takes pride in them.

And the article goes over some extreme comments Liddy made regarding the raid at Waco:

His contempt for the law has not abated. After the 1993 raid in Waco, Texas, Liddy urged lethal violence against federal agents. "Now if the Bureau of Alcohol, Tobacco and Firearms comes to disarm you and they are bearing arms, resist them with arms," he told listeners. "Kill the sons of bitches."