___Iran: The promise: "Do what we must to prevent Iran from obtaining a nuclear weapon." Prospects: Sanctions are destroying Iran's economy but not its will to enrich more uranium. By his own timeline, Obama has about a year left to see if diplomacy and sanctions can get Iran to slow its enrichment of uranium and assure the world its nuclear program is peaceful. If the U.S. and its partners cannot succeed, the stage may be set for an American or Israeli military intervention. ___ Taxes: The promise: Raise taxes on individuals making more than $200,000 and married couples making more than $250,000. No tax increases for people making less. Ensure millionaires pay at least 30 percent of their income in federal taxes. Prospects: Obama's 2014 budget, if passed, would break his promise to avoid any tax increases for middle and low-income people. He proposes a new inflation yardstick that would expose most people to higher income taxes, especially poorer workers. He kept his promise to raise taxes on the rich, though at different income levels than he laid out in the campaign: $400,000 for individuals, $450,000 for couples. Republicans dismiss his proposed minimum rate for millionaires as a gimmick. ___ Associated Press writers Dina Cappiello, Philip Elliott, Ricardo Alonso-Zaldivar, Christopher S. Rugaber, Stephen Ohlemacher, Jonathan Fahey, Bradley Klapper, Erica Werner, David Crary, Nedra Pickler, and Andrew Taylor contributed to this report.