MILWAUKEE — Former U.S. Sen. Russ Feingold will be a pallbearer for his friend and former Senate colleague John McCain.

The Middleton Democrat served in the Senate with McCain from 1993 to 2011. Feingold and the Arizona Republican worked together on a landmark campaign finance law in 2002.

The 81-year-old McCain died Saturday at his home after battling brain cancer.

McCain's website lists Feingold as "Friend. Visiting Professor at Marquette University Law School. Formerly, three-term United States Senator from Wisconsin and U.S. Special Envoy to the Democratic Republic of the Congo."

In a recent New York Times op-ed, Feingold wrote about McCain's character, including his work ethic and sense of humor and said he was a "determined man, always in motion."