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Subscribe to RSSIs the political process an even playing field when it comes to challengers vs. incumbents? Should it be? How could we do it?
Eric Thayer / Getty Images
A supporter listens during a visit by U.S. Sen. John McCain to a campaign office one day before Arizona's primary election on August 23, 2010 in Tucson, Arizona. Once labeled a vulnerable incumbent, the four-term Republican is the clear front-runner against challenger J.D. Hayworth in Tuesday's contest.