The Democratic party retained the presidency and added to their majorities in both chambers of Congress .
The 1964 United States elections was held on November 3 , and elected the members of the 89th United States Congress .
The Democratic party retained the presidency and added to their majorities in both chambers of United States Congress .
The 1964 United States elections was held on November 3 , and elected the members of the 89th United States Congress .