On this day 40 years ago: Senate Watergate hearings begin, "What did the president know and when did he know it?"

Richard Milhous Obama

As the Obama White House continues to get pummeled over its involvement in the Benghazi, IRS, and AP phone records scandals, an ominous anniversary arrived today. On this day in 1973, the Senate Watergate hearings opened.

This question, uttered by Sen. Howard Baker (R-TN) during those hearings, is as timely as ever: "What did the president know and when did he know it?"

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