In 2016, Rader was the operations director of the Cuyahoga County Progressive Caucus, an organization that endorsed and campaigned for Bernie Sanders's presidential campaign, as well as various local progressive causes.[1]
Rader was elected to an at-large seat of the Lakewood, Ohio, city council in 2017,[2] taking office in 2018.[3] He was reelected in 2021.[4]
Rader ran in the Democratic primary for Ohio's 7th congressional district;[5] however, he suspended his campaign on April 2.[6] He remained on the ballot, losing to Matthew Diemer, who went on to lose the general election to Republican Max Miller.[7]
In 2024, Democrat Michael J. Skindell, the representative of the 13th district in the Ohio House of Representatives, chose not to run for reelection.[8] Rader ran to succeed him. He won the Democratic primary unopposed, and won the general election against Republican Robert E. Dintaman.[9]