Hillary Diane Rodham was assigned, Klein told Fox News Channel's "The Big Story with John Gibson" on Thursday, "to come up with regulations that the president and his lawyers could not cross-examine any witnesses, thereby stopping Nixon from proving that whatever abuses he did were no worse than JFK's."

House Watergate Committee counsel John Doar - a Kennedy ally - put Hillary in charge of a group of historians who were researching the protocols of impeachment to see whether any previous president had committed worse crimes than Nixon.

"In fact, they found that [past presidents] had," Klein told Gibson. "And Hillary was ordered to suppress that report."

What had JFK done that was worse than Watergate?

"Kennedy had used the assassination of foreign leaders as an instrument of foreign policy," Klein noted - a crime "far worse" than even the most egregious allegations against Nixon.

Doar ordered Hillary to deep-six her report, to "lock it in a safe and never show anybody, including the chairman of the judiciary committee in the House," whom Doar was supposed to be working for.

As with extraneous evidence uncovered by her husband's impeachment probers 24 years later, Hillary's report on the crimes of the Kennedy administration was ordered sealed for 50 years, said Klein - till 2024.

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