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Volunteers for Republican Presidential hopeful John McCain (R-AZ) -- Bryan Humphreys (left,) Nola Hirdman (center) and Polk County McCain co-chair Steph Wells (right) -- watch him speak in his first visit to Iowa since June. McCain held a press conference in his headquarters in Urbandale, IA, on July 22, 2007, where he declared his presidential campaign would go on, despite losing several aides and $1.7 million to debt.  He has already announced he will not attend the Republican Straw Poll in Ames, IA, on August 11, 2007.