Welcome to WordPress. This is your first post. Edit or delete it, then start writing! Hillary Rodham Clinton, seeking to halt the momentum of her insurgent challenger, Senator Bernie Sanders of Vermont, aggressively questioned his values, positions and voting history Tuesday night in the first Democratic presidential debate, turning a showdown that had been expected to scrutinize her character into a forceful critique of his record. In a series of sometimes biting exchanges, Mrs. Clinton decla...