Former presidential candidate Herman Cain (R) will campaign with Rep. Rodney DavisRodney Lee DavisSenate GOP wary of new tax cut sequel Ryan to retire as Speaker in January DCCC adds first black candidates to list of top candidates MORE's (R-Ill.) primary foe, former Miss America winner Erika Arnold (R), according to the Quad City Times.

Cain, the former CEO of Godfather's Pizza best-known for his "9-9-9" campaign slogan, will help Arnold at two campaign stops on Feb. 1, according to the report.

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Arnold is a big underdog against Davis and has struggled for any traction or fundraising in the race.

Still, the primary challenge is a distraction for Davis, who also faces a tough general election battle in the swing district against Democrat Ann Callis, a former chief judge of Illinois's Third Judicial Circuit.

Both Callis and Davis have also had big-name help in recent weeks. Senate Majority Whip Dick Durbin (D-Ill.) recently stumped with Callis, while House Majority Leader Eric Cantor (R-Va.) recently visited the state with Davis.