Charles H. Percy, a brilliant businessman who represented Illinois for nearly 20 years in the U.S. Senate, once headed the chamber’s powerful Foreign Relations Committee, and harbored unrealized ambitions to run for the presidency, died early Saturday. He was 91. Percy died at 2:30 a.m. Eastern time at a Washington D.C. hospice, according to Kate Kelly, a spokeswoman with WETA, the public broadcasting station in Washington D.C., where Percy's daughter, Sharon Rockefeller is president and CEO. Percy, a moderate Republican, entered the Senate in 1966 after defeating one liberal icon, the late Paul Douglas. But he was ousted by the...