One such tactic the author fails to mention was the successful effort to undermine Johnson's peace negotations by doing illegal covert dealings with the South Vietnamese through Nixon's underlings. Nixon was undermining the negotiations between the U.S. executive branch and North/South Vietnam when Nixon was still a candidate, encouraging the South to hold out until after the election.
You can read about it and much more in Christopher Hitchens' "The Trial of Henry Kissinger." Regardless of one's opinion of Hitchens, he refers to unclassified documents and many other reputable sources in his section on this.
The only reason I mention it here is because the author has attempted to flesh out an analogy with what I must assume were supposed to be the salient details of each item being compared. To do that and leave out the fact that a presidential candidate undermined the acting president's effort to end the war is quite strange.
Also, I'd be interested to hear the author explain what "regular violations of nearby Laos and Cambodia" actually means.