13 days to Nov. 5. City Councillor At-Large John Connolly will hold an 11 a.m. press conference on City Hall Plaza focusing on negative mailers. An independent labor-backed group supporting state Rep. Marty Walsh has put out mailers slamming Connolly as privileged; Walsh has called on them to stop. The mailer issue and Walsh's background as a labor leader came up in last night’s debate at WGBH’s Brighton headquarters. The Globe’s Jim O’Sullivan wrote in his analysis: “Time and again in the opening rounds… Walsh was wedged into a defensive crouch over his lifelong ties to the labor movement, both in his work in the Legislature and as a professional advocate for building trades unions.” After this morning's presser, Connolly heads into the City Council’s chambers, where former rival City Councillor At-Large Felix Arroyo is pushing for an override of Mayor Thomas Menino’s veto of Arroyo’s “Invest in Boston” ordinance. Both candidates are expected to attend a forum put together by the NAACP and the Urban League of Eastern Massachusetts at the Reggie Lewis Athletic Center.

POLL SHOWS TIGHT RACE: A WBUR/MassINC poll has Connolly at 41 and Walsh at 39. ”It’s essentially a toss-up,” Steve Koczela, president of the MassINC Polling Group, told WBUR. The poll comes after many elected officials of color and three former rivals -- Felix Arroyo, John Barros and Charlotte Golar Riche -- getting behind Walsh.

THE DAY AHEAD: A list of happenings, as provided by the campaigns. Schedule entries are subject to change:

State Rep. Marty Walsh

10:00 a.m. Alliance for Business Leadership 2013 Fall CEO Summit (Harvard Club, 374 Commonwealth Ave., Boston)

6:00 p.m. NAACP/Urban League of Eastern Massachusetts Debate (Reggie Lewis Track and Athletic Center, 1350 Tremont St., Roxbury Crossing, MA 02120)

City Councillor At-Large John Connolly

Press Conference
11:00 AM
Near Government Center steps at City Hall Plaza, Boston, MA

City Council Meeting
12:00 PM
City Hall, Boston, MA

Communities of Color Mayoral Debate
5:30 PM
Reggie Lewis Center, 1350 Tremont Street, Roxbury Crossing, MA