Chicago Teachers Union political director Hilario Domínguez announced Thursday that he is running for school board president, joining a crowded field vying to lead the governing body of the nation’s fourth-largest school district.Chicago school board hopefuls file to enter historic race Domínguez, a former special education teacher, is the fifth candidate to enter the race for the citywide role. He joins former board appointee Sendhil Revuluri, sitting board members Jennifer Custer and Jessica Biggs, and trial attorney Victor Henderson. In a historic first for Chicago, all 21 school board seats will be on the November ballot. The board was previously...