In 2006, Kopp sought election to the state senate seat formerly held by term-limited Sen. Norma Anderson.

Kopp was appointed by a Republican Party vacancy committee to fill the remainder of Traylor's term, and was sworn in as a state senator on January 4, 2007, a few days ahead of when he would have otherwise taken office.

[25] In November 2007, Senate Republicans elected Kopp minority caucus chair, following the resignation of Sen. Ron May.

[27] During the 2008 session, Kopp plans to sponsor bills to create a sales tax holiday for school supplies,[28] to require students to pass standardized tests as a requirement for graduating from high school,[29] to provide income tax credits for volunteer firefighters,[30] and to create wildfire training programs for fire district boards.

[31] He was also the Senate sponsor of a measure to create an interim committee to study wildfire risks in the wildland–urban interface, calling it the "most pressing public-safety issue before the state.

"[32][33] After the 2008 session, Kopp proposed an "omnibus bill" with incentives for volunteer fire departments to retain personnel,[34] and legislation to set "bookends" on the starting and ending dates for school years.

[35] Responding to a deal between labor and business leaders to remove several statewide referendums from the 2008 general election ballot, Kopp and Rep. Amy Stephens announced plans to introduce legislation that would prohibit financial deals for the removal of initiatives from Colorado election ballots.

These bipartisan task forces were intended to investigate the executive branch department and agencies as well as the current regulatory system.

After a period of analysis, the task forces would then present their findings, recommendations, and estimated cost savings in an attempt to provide a leaner and more effective government.