But after listening carefully to both sides and, most importantly, reviewing the words of the witnesses themselves, they did not prove their theory of perjury and obstruction of justice beyond a reasonable doubt to me.

CNN: Sen. Murray's closed-door impeachment statement

Under this theory, a president's obstruction and perjury must involve concealment of official actions.

CNN: Transcript: Judiciary Committee impeachment hearing

Unfortunately, like so much of the obstruction case, the facts do not bear out this convenient theory.

CNN: Transcript: White House Counsel Ruff's opening statement

The managers, as was true of the majority report and the independent counsel referral (ph) before that build their theory in this case not only any pillars of obstruction, but on shifting sand castles of speculation.

CNN: Transcript: White House Counsel Ruff's opening statement