<blockquote>Now we know Nixon lied. A newfound cache of notes left by H. R. Haldeman, his closest aide, shows that Nixon directed his campaign’s efforts to scuttle the peace talks, which he feared could give his opponent, Vice President Hubert H. Humphrey, an edge in the 1968 election. On <a title="Haldeman Notes" href="http://www.nytimes.com/interactive/2016/12/31/opinion/sunday/haldeman-notes.html">Oct. 22, 1968</a>, he ordered Haldeman to “monkey wrench” the initiative.</blockquote>
via <a href="https://www.nytimes.com/2016/12/31/opinion/sunday/nixons-vietnam-treachery.html?_r=0">Nixon’s Vietnam Treachery - The New York Times</a>.
<blockquote>Johnson’s closest aides urged him to unmask Nixon’s actions. But on a Nov. 4 conference call, they concluded that they could not go public because, among other factors, they lacked the “absolute proof,” as Defense Secretary Clark Clifford put it, of Nixon’s direct involvement.</blockquote>