"Don't take the short-term easy route and just engage in destructive behavior," the president said.
Denise Davis and Amy Crawford filed candidacy petitions to run against incumbent James Cappleman.
Maria Gonzalez interrupted Obama's speech, unfurling a banner demanding an end to deportation.
Six contenders are also running in the sprawling 2nd Ward.
Three challengers have filed to oppose Ald. Deb Mell in the 33rd Ward aldermanic race.
The crowded field includes five first-time challengers to Ald. Michele Smith (43rd)
Incumbent Deborah Graham is running in the 29th Ward.
The crowd of candidates challenging veteran Ald. Danny Solis includes his former chief of staff.
The union activist said he had support, but not enough money to make a run for alderman.
The South Side neighborhood will host a forum where candidates will make their pitches.
Incumbents Ald. Pawar in the 47th and Ald. O'Connor in the 40th will face challengers in February.
The two City Council members are among seven who have registered as candidates in the Englewood ward.
John Arena, Michelle Baert, Michael Diaz and John Garrido are running for 45th Ward alderman.
Nine candidates have filed to replace Ald. Tim Cullerton, who is retiring.
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