President Bush Wednesday is reversing himself and now supports giving the panel more time to produce a final report.
White House aides have said privately that they're afraid the commission's report could include a damaging look at the administration's handling of intelligence, and that it could come right in the middle of the presidential campaign.
As it stands now, the commission is supposed to finish its work on May 27, but last month, the panel asked Congress for a two-month extension. It said it needed more time to look at the huge number of documents about the disaster.
Wednesday, the White House agreed, saying it approves moving back the deadline to late July. But spokesman Scott McClellan is calling on the commission to wrap up its work within 30 days after that.
If Congress agrees, the report would arrive at the end of August.