A campaign debate over a San Jose measure heated up late Saturday morning when a councilman was caught taking down signs that urged residents to vote against a measure he supports on the November ballot. San Jose Councilman Pierluigi Oliverio said he took down four “No on (Measure) V” signs Saturday morning, saying he had seen “an incredible number” of the signs in San Jose while driving to an opening of a community center. Measure V would change the mandatory arbitration process for police and fire department employee disputes. It’s opposed by police and firefighters, who claim it will make it easier to lay off firefighters and police officers and to close neighborhood fire stations. Prominent supporters of Measure V include Mayor Chuck Reed, San Jose Silicon Valley Chamber of Commerce CEO Patricia Dando and Silicon Valley Taxpayers’ Association president Douglas McNea.