Big fan of election and demographic numbers since 2006
 

1966 United States Congressional Elections – Delaware

United States Senate – GOP Hold

J. Caleb Boggs (R-inc) – 97,26859.12%

James M. Tunnell, Jr. (D) – 67,26340.88%

Total Votes – 164,531100.00%

United States House of Representatives – District At Large – GOP Gain

William V. Roth, Jr. (R) – 90,96155.77%

Harris B. McDowell, Jr. (D-inc) – 72,14244.23%

Total Votes – 163,103100.00%

Source: Office of the Clerk of the United States House of Representatives