The Turkish government is expanding its witch hunt of suspected allies of cleric Fethullah Gulen by opening an investigation into 17 U.S.-based individuals, including New York Sen. Chuck Schumer and former CIA director John Brennan. Turkish investigators are interested in Schumer because of donations he has received from Gulen’s supporters here in the U.S. The complaint also names several Gulenists who operate non-profit organizations here in the U.S. One of those is Recep Ozkan, the former president of the Gulen-linked Turkish Cultural Center. Ozkan donated heavily to Hillary Clinton’s presidential campaigns and as much as $1 million to the Clinton...