Republican Senator McSally criticized what she termed a "radical political organisation" and called her Democratic rival "Counterfeit Kelly".
The Republican senator is engaged in a tight race in Arizona, which the latest opinion poll suggests is leaning toward the Democrats.
The spread has since been characterized as "incitement" and a "call for violence."
Former congresswoman releases statement decrying gun violence after three workplace shootings occur across the country in less than 24 hours.
The former Congresswoman who was shot in 2011 spoke with Newsweek about the small steps she's made in both recovery and gun reform.
Newspaper corrects suggestion that Palin PAC's mailer helped incite the Giffords' shooting.
Clinton will campaign Monday night in Cincinnati alongside gun-violence survivor Gabrielle Giffords, a former U.S. representative.
The national tour will reach at last 43 cities across 14 states in six weeks and end on Election Day.