President Barack Obama, who has pledged to work on long-term U.S. debt and deficit challenges, will delay the delivery of his fiscal year 2012 budget by a week until after February 14, an official said Monday. An administrative official said the delay was due to the long time it took for the U.S. Senate to confirm Jack Lew as Obama's new budget director, and because funding decisions for 2011 were carried out late into the year.