In 1992, Coppersmith won the Democratic primary in Arizona's 1st District and faced three-term RepublicanJay Rhodes in the general election. Coppersmith won the elections and became a U.S. Representative from the Democratic Party for Arizona's 1st Congressional District.[3]
Senate race
In 1994, Coppersmith gave up his seat after only one term to run for the U.S. Senate when Dennis DeConcini retired. In the Democratic race to replace the retiring DeConcini, Rep. Sam Coppersmith won with a razor-thin margin of 32 votes (81,547 votes vs 81,515 for Richard Mahoney).[4] He subsequently lost to fellow Congressman Jon Kyl by 14 points.
Private law practice
After leaving Congress, Coppersmith spent two years as the chairman of the Arizona Democratic Party.[1] He is as of 2013[update] an attorney specializing in real estate law and a managing partner of the law firm of Coppersmith Schermer & Brockelman PLC.[2][5] He has a blog called LiberalDesert.