His opponent Jeff Hart sent out campaign advertisements falsely accusing Hansen of being supported by the National Rifle Association of America and later apologized for it.

[3][14][15][16] A vacancy committee voted to appoint Steven Woodrow to replace Hansen in the state house on February 4.

[17] Hansen defeated Maria E. Orms for the Democratic nomination and won in the general election against Republican nominee Doug Townsend.

[23] Hansen filed to run in the 2023 Denver mayoral election on November 14, 2022, but failed to advance to the runoff after placing sixth[24][25] and endorsed Kelly Brough.

[27] On November 12, 2024, it was announced that Hansen would resign from the start of the new session to become the CEO of La Plata Electric Association.

[28] On January 8, 2025, it was announced that Matthew Ball, Policy Director to Mayor Mike Johnston, would fill the vacancy.

[29] Hansen sponsored legislation to change the name of Columbus Day to instead honor Frances Xavier Cabrini.

[30] He and Representative Dafna Michaelson Jenet sponsored a resolution criticizing President Donald Trump's travel ban.

[32] He was one of the signatories of a letter sent to Representatives Lauren Boebert and Doug Lamborn calling for them to resign for inciting the 2021 United States Capitol attack.