Six hours earlier, Johnson had met with Minnesota senator Hubert Humphrey, a man widely perceived as a front-runner for the vice-presidential nomination who had emerged as the administration's most effective defender in the upper chamber. After that early afternoon meeting, Humphrey, the Senate majority whip, gave a rousing pro-Democratic statement to the press. Now, pleased with Humphrey's response to GOP attacks on the administration, Johnson phoned him, encouraging him to continue his rhetoric and told him to "every day . . . to say, 'The Democratic Party is the one party left for America, because the other fellows don't stand for anything.'"
This segment picks up two-and-a-half minutes into the call.