Oops - my bad - that was 1968 for McCarthy, but his campaign was still crushed by McGovern.
"Early on [Hunter S.] Thompson got kicked off the Ed Muskie campaign for giving his press pass to some “gin-crazed Boohoo” who ended up terrorizing Muskie on a train trip down the coast of Florida. In retaliation for having his privileges taken away, Thompson, who never liked “Big Ed” anyway, began to write extensively about how it was rumored that Muskie was addicted to a West African drug called Ibogaine, an upper of sorts that keeps a person awake in a very menacing fashion. Thompson speculated that this was probably the reason why Muskie had been acting so “erratic” of late. Unfortunately, he could not confirm it one way or the other because he had been banned from the campaign. Readers and other reporters took the allegation seriously and questions were put to the Muskie campaign. Denying the charge, Muskie expressed outrage. After the campaign ended, Thompson stated that he never accused Muskie of using Ibogaine. “I said it was a rumor to that effect,” Thompson explained. “I made up the rumor.”