<page_title> 1956 United States Senate elections </page_title> <section_title> Races leading to the 85th Congress </section_title> <table> <cell> Pennsylvania <col_header> State </col_header> <col_header> Senator </col_header> </cell> <cell> James H. Duff <col_header> Incumbent </col_header> <col_header> Party </col_header> </cell> <cell> Republican <col_header> Incumbent </col_header> <col_header> Electoral history </col_header> </cell> <cell> Incumbent lost re-election. New senator elected. Democratic gain. <col_header> Results </col_header> </cell> <cell> √ Joseph S. Clark (Democratic) 50.1% James H. Duff (Republican) 49.7% <col_header> Candidates </col_header> </cell> </table>
In Pennsylvania, incumbent Republican U.S. Senator James H. Duff sought re-election, but was defeated by the Democratic nominee, Joseph S. Clark.