started the process, while Johnson was still asleep. At 6:30 a.m., Kennedy asked his brother to prepare an estimate of upcoming electoral votes, "including Texas". Robert Kennedy called Pierre Salinger and Kenneth O'Donnell to assist him. Realizing the ramifications of counting Texas votes as their own, Salinger asked him whether he was considering a Kennedy-Johnson ticket, and Robert replied, "Yes". Between 9 and 10 a.m., John Kennedy called Pennsylvania governor David L. Lawrence, a Johnson backer, to request that Lawrence nominate Johnson for vice president if Johnson were to accept the role, and then went to Johnson's suite to discuss a mutual ticket at 10:15 a.m. John Kennedy then returned to his suite to announce the Kennedy-Johnson ticket to his closest supporters and Northern political bosses. He accepted the congratulations of Ohio Governor Michael DiSalle, Connecticut Governor Abraham A. Ribicoff, Chicago mayor Richard J. Daley, and New York City mayor Robert F. Wagner Jr. Lawrence said that "Johnson has the strength where you need it most"; he then left to begin writing the nomination speech. O'Donnell remembers being angry at what he considered a betrayal by John Kennedy, who had previously cast Johnson as anti-labor and anti-liberal. Afterward, Robert Kennedy visited with labor leaders who were extremely unhappy with the choice of Johnson, and, after seeing the depth of labor opposition to Johnson, he ran messages between the hotel suites of his brother and Johnson, apparently trying to undermine the proposed ticket without John Kennedy's authorization and to get Johnson to agree to be the Democratic Party chairman, rather than vice president. Johnson refused to accept a change in plans, unless it came directly from John Kennedy. Despite his brother's interference, John Kennedy was firm that Johnson was who he wanted as running mate, and met with staffers such as Larry O'Brien, his national campaign manager, to say Johnson was to be vice president. O'Brien recalled later that John Kennedy's words were wholly unexpected, but that, after a brief consideration of the electoral vote situation, he thought "it was a stroke of genius". Republican Party Republican candidates With the ratification of the 22nd Amendment in 1951, President Dwight D. Eisenhower could not run for the office of president again; he had been elected in 1952 and 1956. In 1959, it looked as if Vice President Richard Nixon might face a serious challenge for the Republican nomination from New York Governor