Martin Sabo was first elected to the U.S. House in 1978, defeating Republican Michael Till with 62 percent of the vote. He was re-elected to seven consecutive terms by wide margins, defeating Republican Raymond C. Gilbertson in 1990 with 73 percent of the vote and in 1992, he defeated Republican Stephen Moriarty with 69 percent of the vote.
He was re-elected in 1994 with 62 percent, defeating Republican Dorothy LeGrand. In 1996, he was re-elected with 64 percent of the vote against Republican Jack Uldrich. In 1998, Sabo defeated Republican Frank Taylor with 67 percent of the vote and again in 2000 with 69 percent.
In 2002, Sabo was re-elected with 67 percent of the vote. He faced political newcomer Republican Daniel Mathias in that race.
Sabo served nine terms in the state House before his election to Congress.