- Source: 1978 United States Senate election in New Hampshire
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The 1978 United States Senate election in New Hampshire took place on November 7, 1978. Incumbent Democratic Senator Thomas J. McIntyre ran for re-election to a fourth term but was defeated by Republican Gordon J. Humphrey.
Democratic primary
= Candidates
=Raymond J. Coughlan, former U.S. Navy captain
Thomas J. McIntyre, incumbent Senator
= Results
=Republican primary
= Candidates
=Carmen Chimento, perennial candidate
Gordon J. Humphrey, professional pilot and conservative activist
Alf E. Jacobson, State Senator from New London
James Masiello, businessman and former Mayor of Keene
= Results
=General election
= Results
=See also
1978 United States Senate elections