[2] Frierson, a Democrat, was a member of the Nevada Assembly from February 7, 2011 to 2014, when he was defeated by John Moore by 40 votes.

He was speaker of the Assembly 2017-2022, and was a member of the National Black Caucus of State Legislators.

[5] In 2010, Democratic assemblywoman Barbara Buckley retired from the Assembly because she was term limited and left the District 26 seat open.

Frierson won the three-way June 8, 2010, Democratic primary with 586 votes (48.83%),[6] and won the three-way November 2, 2010, general election with 3,853 votes (58.31%) against Republican nominee Joe Egan and Independent American candidate Stacey Gonzales.

[11] On November 12, 2021, President Joe Biden announced his intent to nominate Frierson to serve as the United States attorney for the District of Nevada.