SDEROT, Israel (Reuters) - U.S. Democratic presidential candidate Barack Obama assured Israel and its U.S. Jewish supporters on Wednesday he was a friend who would not press for peace concessions that would compromise its security. Hailing Israel as a "miracle," he vowed staunch support and held only a low-profile meeting with Palestinian leaders in the occupied West Bank. Obama, seeking to allay wariness among some U.S. Jewish voters about his policy towards Israel, flew to Sderot, a town hit by rockets fired from the Hamas-run Gaza Strip, saying he hoped to bring peace but would not dictate the terms of...