His top challengers are councilmen Chris Bell, (D), a former Brown supporter, and Orlando Sanchez (R), a Cuban immigrant who is hoping to become the city's first Hispanic mayor.

CNN: New York, other major U.S. cities look for new stewards

McCain was angrily challenged on campaign finance reform by Rep. Randy "Duke" Cunningham (R-California), a fellow Vietnam War veteran and supporter of Texas Gov. George W. Bush, the presumptive GOP presidential nominee.

CNN: McCain to campaign for House Republicans this fall