in voter registration, Humphrey stopped being identified in ads as "Vice-President Hubert Humphrey", instead being labelled "Democratic candidate Hubert Humphrey". Humphrey attacked Wallace as a racist bigot who appealed to the darker impulses of Americans. Wallace had been rising in the polls as a result of tailoring his message to audiences outside of his southern strongholds by using anti-establishment rhetoric and attacks on "concentrated wealth", with Wallace's polling numbers peaking at 21% nationally in late September and early October. However, Wallace's momentum went into reverse after he selected Curtis LeMay as his running mate. Curtis LeMay's suggestion of using tactical nuclear weapons in Vietnam conjured up the worst memories of the 1964 Goldwater campaign. Labor unions also undertook a major effort to win back union members who were supporting Wallace, with some substantial success. Polling numbers that had showed Wallace winning almost one-half of union members in the summer of 1968 went increasingly into sharp decline as the election campaign progressed into the fall up to early November election day. As election day approached and Wallace's support in the North, Midwest and West began to wane, Humphrey finally began to climb in the polls. In October, Humphrey—who was rising sharply in the polls due to the sharp decline of the Wallace polling—began to distance himself publicly from the Johnson administration on the Vietnam War, calling for a bombing halt. The key turning point for Humphrey's campaign came when President Johnson officially announced a bombing halt, and even a possible peace deal, the weekend before the election. The "Halloween Peace" gave Humphrey's campaign a badly needed boost. In addition, Senator Eugene McCarthy finally endorsed a vote for Humphrey in late October after previously refusing to do so, and by election day the polls were reporting a dead heat. Nixon campaign sabotage of peace talks The Nixon campaign had anticipated a possible "October surprise", a peace agreement produced by the Paris negotiations; as such an agreement would be a boost to Humphrey, Nixon thwarted any last-minute chances of a "Halloween Peace". Nixon told campaign aide and his future White House Chief of Staff H. R. Haldeman to put a "monkey wrench" into an early end to the war. Johnson was enraged and said that Nixon had "blood on his hands", and that Senate Minority Leader Everett Dirksen agreed with Johnson that such action was "treason".Robert "KC" Johnson. "Did Nixon Commit Treason in