With deadlines approaching, the State Department on Tuesday said it has seen no indications that Iran plans to comply with U.N. demands that it suspend enrichment of uranium, a key step in making nuclear weapons. Defiance could trigger efforts by the United States and European allies to impose economic or political sanctions on Iran in the Security Council. Secretary of State Condoleezza Rice, due in New York this week to oversee U.N. attempts to bring about a cease-fire in the Mideast, will also confer with foreign ministers about how to deal with Iran, said the State Department spokesman Sean McCormack....