[7] Niska ran in the Republican primary for Attorney General of Minnesota in 2018, saying he would focus on consumer protection and criticizing incumbent Lori Swanson for signing onto a lawsuit challenging Trump's travel ban from some Muslim-majority countries.
He first ran after legislative redistricting and after three-term Republican incumbent Cal Bahr announced he would not seek reelection and would run for a seat in the Minnesota Senate.
[12][13][14] He opposed legislation that prohibited post-secondary institutions participating in PSEO from requiring faith statements, saying it infringed on religious liberties.
[15] In 2023, he introduced legislation to address water contamination issues in the city of Andover[16] and a bill that would prevent nonprofits from paying people's bail.
[23] He proposed removing sections of the bill that categorize advertising for the procedure's efficacy or "representing homosexuality as a mental disease, disorder, or illness",[24] as consumer fraud.
[25] Niska criticized a bill that both removed language within state law associating sexual orientation with pedophilia and also added gender identity as a protected class in Minnesota's human rights statute.