6 made a record of four assassinations in the 1960s. Humphrey edged out anti-Vietnam war candidate McCarthy to win the Democratic nomination, sparking numerous anti-war protests. Nixon entered the Republican primaries as the front-runner, defeating liberal New York governor Nelson Rockefeller, conservative governor of California Ronald Reagan, and other candidates to win his party's nomination. Alabama's Democratic former governor, George Wallace, ran on the American Independent Party ticket, campaigning in favor of racial segregation on the basis of "state's rights". The election year was tumultuous and chaotic. It was marked by the assassination of Martin Luther King, Jr. in early April, and the subsequent 54 days of riots across the nation, by the assassination of Robert F. Kennedy in early June, and by widespread opposition to the Vietnam War across university campuses. Vice President Hubert Humphrey won and secured the Democratic nomination, with Humphrey promising to continue Johnson's war on poverty and to support the civil rights movement. The support of civil rights by the Johnson administration hurt Humphrey's image in the South, leading to the prominent Democratic governor of Alabama, George Wallace, to mount a third-party challenge against his own party to defend racial segregation on the basis of "state's rights". Wallace led a far-right American Independent Party attracting socially conservative voters throughout the South, and encroaching further support from white working-class voters in the Industrial North and Midwest who were attracted to Wallace's economic populism and anti-establishment rhetoric. In doing so, Wallace split the New Deal Coalition, winning over Southern Democrats, as well as former Goldwater supporters who preferred Wallace to Nixon. Nixon chose to take advantage of Democratic infighting by running a more centrist platform aimed at attracting moderate voters as part of his "silent majority" who were alienated by both the liberal agenda that was advocated by Hubert Humphrey, and by the ultra-conservative viewpoints shared by George Wallace on race and civil rights, yet used coded language to combat Wallace in the Upper South, where these states were less extreme on the segregation issue. Nixon sought to restore law and order to the nation's cities and provide new leadership in the Vietnam War. During most of the campaign, Humphrey trailed Nixon significantly in polls taken from late August to early October. In the final month of the campaign, Humphrey narrowed Nixon's lead after Wallace's candidacy collapsed and Johnson suspended bombing in the Vietnam War to appease