Calvin Butts, a Harlem pastor and head of the Abyssinian Development Corporation, is considering a run for mayor in 2017, when he could face off against fellow real estate executives Don Peebles and Paul Massey. The 67-year registered Democrat, who also serves as president of SUNY Old Westbury, said he would potentially run as a Republican. “Political parties aren’t golden calves. I don’t think in terms of Democrats, Republicans.