Barack Obama wants to cut the federal deficit in half by the end of his first term, mostly by scaling back Iraq war spending, raising taxes on the wealthiest and streamlining government, an administration official said Saturday as the president worked to finalize his first budget request. Obama's proposal for the 2010 fiscal year that begins Oct. 1 projects that the estimated $1.3 trillion deficit he has inherited from former President George W. Bush will be halved to $533 billion by 2013. That's a difference of 9.2 percent of the overall economy now vs. 3 percent in four years. "We can't generate sustained growth without getting our deficits under control," Obama said in his weekly radio and Internet address that seemed to preview his intentions. He said his budget will be "sober in its assessments, honest in its accounting, and lays out in detail my strategy for investing in what we need, cutting what we don't, and restoring fiscal discipline." He's expected to outline some broad themes of his budget request Monday at a White House summit on fiscal policy and touch on it during his first speech to Congress on Tuesday evening. He is slated to officially send at least a summary of it to Congress on Thursday, barely a week after his $787 billion economic stimulus plan becoming law.