[cnn-photo-caption image= http://i.l.cnn.net/cnn/2008/images/01/11/art.mccainad.cnn.jpg caption="McCain is up with a new ad in Michigan."]
(CNN) - Republican John McCain launched a new ad in Michigan Friday that stresses his bipartisan credentials in a state where crossover voting may play a major role in the presidential primary outcome.
In the 30-second spot, "Endorsed Michigan," an announcer reads from recent editorials in The Detroit News and the Detroit Free Press that praise the Arizona senator as a "straight shooter," "a conservative who has worked across the aisle," and a Republican with "broad appeal to the middle of the electorate."
There is no party registration in Michigan, and registered voters can cast their ballots in any primary. Since national party penalties have meant that most of the Democratic presidential field has pulled there name from the ballot – and none of the major candidates in that party will be campaigning in the state – Democrats and independents may play a far greater role in next Tuesday’s GOP primary than they do in most cycles.
Most recent surveys have found McCain, Mitt Romney and Mike Huckabee locked in a tight battle for the top spot in that race.