In 1966, Davis was elected as a
Republican to the
Michigan House of Representatives from the
state's 106th District and was reelected in 1968. In 1970, Davis was elected to the
Michigan State Senate from the
37th district and was reelected in 1974. He served as the Majority Whip, 1970–1974, and as Senate Republican Leader, 1974–1978. In 1978, Davis was elected to the
96th United States Congress and was subsequently re-elected to the six succeeding Congresses. Davis did not seek re-election in 1992. In Congress, Davis helped establish the
Thunder Bay National Marine Sanctuary and the
Keweenaw National Historical Park. In early 1992, Davis was implicated in the
House banking scandal or congressional check-kiting scandal. The Congress ran its own bank and allowed members who wished to do so to frequently write overdrawn or insufficient fund checks to their account. Davis was one of the most notorious of these, writing many overdrawn checks. There was no illegality, though, since the bank allowed members overdraft protection. For the elections of 1992, after redistricting due to the
1990 census, most of what had been 11th congressional district became
Michigan's 1st congressional district, while the 11th district was apportioned to represent a part of the
Metro Detroit area. In 1992,
Democrat Bart Stupak was elected from 1st district, succeeding Davis as the U.S. representative for the U.P. and Northern Michigan. Stupak, coincidentally, defeated
Philip Ruppe, the man Davis replaced as congressman in 1978. Davis lived in
Gaylord, Michigan. ==Post-Congressional career and life==