Voters cast ballots in the GOP primary elections in Arizona and Michigan today, with a combined 59 delegates at stake between the two states. While Newt Gingrich has moved his focus to next week's Super Tuesday states, Republican Presidential candidates Mitt Romney and Rick Santorum continued to campaign in Michigan.

AP Photo/Gerald Herbert

Romney took questions from reporters and greeted campaign volunteers at a call center in Livonia, Michigan earlier today.

AP Photo/Gerald Herbert

One of those volunteers, who worked on Romney's father's gubernatorial campaign decades ago, showed the candidate a historic campaign hat from that era.

AP Photo/Paul Sancya

Santorum greeted diners at two local restaurants in Michigan, including one in Kentwood, before moving on to a rally in Perrysburg, Ohio. The candidate has another event scheduled back in Michigan later tonight.

AP Photo/Carlos Osorio