The 1998 United States Senate election in Vermont was held November 3, 1998. Incumbent Democratic U.S. Senator Patrick Leahy won reelection to a fifth term.
Notably, the Republican nominee, dairy farmer and actor Fred Tuttle, had run to draw attention to the mock documentary film Man with a Plan, of which he was the star, and to ridicule Republican candidate Jack McMullen as too new to Vermont to represent it in Washington. After winning the nomination, Tuttle endorsed Leahy all but withdrew from the race. His campaign, which had been conducted primarily from his front porch in Tunbridge, Vermont, spent only $251 during the election season and featured the slogans "Spread Fred!" and "Why Not?". In spite of his endorsement of Leahy, Tuttle still received 48,051 votes, or 22% of the total.