City voting officials said the election had drawn a smaller turnout than they had anticipated. Along with Mr. Chico and Ms. Braun, who was winning 8.8 percent of the vote Tuesday night, Mr. Emanuel defeated Miguel del Valle, the city clerk, who got 9.4 percent; Patricia Van Pelt-Watkins, 1.6 percent; and William Walls, 0.9 percent.

Mr. Emanuel  who has spent plenty of time working behind the scenes for other politicians, including Mayor Daley and President Bill Clinton  has long been known for his tough-guy methods of negotiating, his harsh, blunt retorts, and his use of four-letter words. But over the last five months, in his own campaign, Mr. Emanuel showed a far more reserved side. That left some here wondering which Mr. Emanuel  fierce or muted  may next appear, with the campaign over and the governing ahead.

Mr. Emanuel had long suggested that he would love to be the mayor of Chicago, his birthplace. But his immediate road to City Hall began last September, when Mayor Daley stunned this city and announced he would not seek a seventh term. That meant the first mayoral election in 64 years without a sitting mayor on the ballot, and a huge crop of would-be candidates emerged from seemingly every political rank.

In October, Mr. Emanuel left his post as White House chief of staff to return to Chicago for a run, and the number of candidates quickly began shrinking. In the months that followed, he would raise some $13 million and campaign at more than 100 neighborhood L stations, 229 neighborhood stops and 20 schools.

In the end, the effort  far more elaborate and expensive than his five opponents’  spared him from a runoff in April. Some opponents had viewed that second race  a head-to-head race with only one candidate  as the only chance of defeating Mr. Emanuel.

After Mr. Chico spoke on the telephone to Mr. Emanuel on Tuesday evening, Mr. Chico told his supporters that he had pledged his support, from here on out, to Mr. Emanuel’s efforts for Chicago. “Let’s all work together to get behind the new mayor,” Mr. Chico told a subdued group during his brief concession speech, “and make this the best city on the face of the earth.”