operation would carry her to victory over david catania. catania, an independent focusing on school and government reform, has run a stronger than expected campaign against bowser in this overwhelmingly democratic city. three out of four voters are registered democrats. and while voting turnout was steady around the city today but not spectacular, whoever wins the mayor's office will face more demanding voters in a fast-changing city. both mayors vincent gray last spring and adrian fenty in 2010 were defeated in their re-election bids. what's the challenge for the mayor to represent all of the people? >> building a coalition that involves, you know, all of d.c. as well as the new d.c. i think that's the challenge for this mayor or for any mayor. >> reporter: carol schwartz making her fifth run for mayor came out of retirement and switched from republican to independent in just the past three months for this contest.