Ben Carson, retired neurosurgeon turned conservative star, has confirmed that he will seek the Republican presidential nomination in 2016. Carson, who has never run for public office, is expected to be the only high-profile African-American to enter the GOP’s presidential primary as he tries to parlay his success as an author and speaker into a competitive campaign against established politicians. “I’m willing to be part of the equation and therefore, I’m announcing my candidacy for president of the United States of America,” he said in an interview aired Sunday night by Ohio’s WKRC television station. He is set to make...