Sen. Lyndon Johnson, center, confers with Sen. Hubert H. Humphrey, left, and Sen. Richard B. Russell in 1954. Johnson was elevated to majority leader in 1955, and rapidly grew into the job.

Sen. Lyndon Johnson, center, confers with Sen. Hubert H. Humphrey, left, and Sen. Richard B. Russell in 1954. Johnson was elevated to majority leader in 1955, and rapidly grew into the job.