There's been lots of troubling things.
LBJ’s ‘X’ File on Nixon’s ‘Treason’
March 3, 2012
Special Report: In the dusty files of Lyndon Johnson’s presidential library in Austin, Texas, once secret documents and audiotapes tell a dark and tragic story of how Richard Nixon’s team secured the White House in 1968 by sabotaging peace talks that might have ended the Vietnam War four years earlier, Robert Parry reports.
After hearing from Dirksen, Nixon grew concerned that Johnson might just go public with his evidence of the conspiracy. Nixon discussed his worries with Sen. George Smathers, a conservative Democrat from Florida, who, in turn, called Johnson on the morning of Nov. 3, just two days before the election.
There are conspiracy theories, and there are conspiracies.
https://consortiumnews.com/2012/03/03/lbjs-x-file-on-nixons-treason/