The new Rasmussen poll of Arizona has Sen. John McCain (R-AZ), the 2008 Republican nominee for president, with only a single-digit lead over his challenger in the Republican primary, former Arizona Congressman J.D. Hayworth, and the incumbent McCain is under 50% support.
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The numbers: McCain 48%, Hayworth 41%, with a Â±4% margin of error. McCain had a much better lead of 53%-31% two months ago, shortly after the announcement that his former running mate Sarah Palin would come to Arizona to campaign for him. Back in November, when Hayworth was first making moves to get into the race, McCain had a statistically insignificant lead of 45%-43%.