Republican gubernatorial candidate Bruce Blakeman blasted Mayor Zohran Mamdani’s goal of phasing out part of the Big Apple’s Gifted and Talented program — arguing student achievement should be “colorblind.” The Nassau County executive, during a press conference at the Guangdong Association in Manhattan, attempted to tie Gov. Kathy Hochul to the Democratic socialist’s education policy as the Long Island politician vowed to expand the initiative. The city’s Gifted and Talented programs have been