FBI raid portends political and legal challenges for U.S. Rep. Henry Cuellar
By Patrick Svitek & Abby Livingston
After Forging Ties With Azerbaijan Oil Executives, Rep. Henry Cuellar Pushed Nation's Agenda in Congress
By Ryan Grim & Lee Fang
Henry Cuellar says he’s cooperating with FBI investigation
By Brooke Park & Abby Livingston