Richard Nixon was a traitor.

The new release of extended versions of Nixon’s papers now confirms this long-standing belief, usually dismissed as a “conspiracy theory” by Republican conservatives. Now it has been substantiated by none other than right-wing columnist George Will.

Nixon’s newly revealed records show for certain that in 1968, as a presidential candidate, he ordered Anna Chennault, his liaison to the South Vietnam government, to persuade them refuse a cease-fire being brokered by President Lyndon Johnson.

Nixon’s interference with these negotiations violated President John Adams’s 1797 Logan Act, banning private citizens from intruding into official government negotiations with a foreign nation.

Published as the 40th Anniversary of Nixon’s resignation approaches, Will’s column confirms that Nixon feared public disclosure of his role in sabotaging the 1968 Vietnam peace talks. Will says Nixon established a “plumbers unit” to stop potential leaks of information that might damage him, including documentation he believed was held by the Brookings Institute, a liberal think tank. The Plumbers’ later break-in at the Democratic National Committee led to the Watergate scandal that brought Nixon down.

Nixon’s sabotage of the Vietnam peace talks was confirmed by transcripts of FBI wiretaps. On November 2, 1968, LBJ received an FBI report saying Chernnault told the South Vietnamese ambassador that “she had received a message from her boss: saying the Vietnamese should “hold on, we are gonna win.”