Mayor Knox White has led Greenville, S.C., for 15 years, and is running unopposed for another term. Here, he stands near a natural waterfall that's in the middle of the city's downtown, in a park that cost $13 million. "Within two years," he says, "over $100 million in private investment was created around the park." Julie Rose/WFAE hide caption

itoggle caption Julie Rose/WFAE

Rahm Emanuel celebrated with supporters at the Journeymen Plumbers' Union Local 130 Hall after winning the mayoral election in February. Now, Emanuel is in a test of wills with unions over closing the city's massive budget gap. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images