Wisconsin GOP Sen. Ron Johnson is running for reelection against Democratic Lt. Gov.
Johnson has maintained a conservative voting record during his two terms in the Senate.
In the Senate, Johnson serves on the Foreign Relations Committee, the Budget Committee, the Homeland Security and Governmental Affairs Committee, and the Commerce Committee.
Barnes, who in 2018 was elected as lieutenant governor on a ticket with Democratic Gov.
Barnes has raised nearly $26.1 million, spent $22.7 million, and has $3.5 million in the bank, as of September 30.