The divisive issue of Iraq is likely to loom large over proceedings as the two men and their foreign ministers sit around the table for what aides said were "wide ranging" discussions at Bush's Camp David, Maryland, retreat.
Brown again moved to quash speculation that he wants to distance his administration from the White House because of lingering resentment over Iraq.
Describing himself as an "Atlanticist" and a "great admirer of the American spirit of enterprise and national purpose", the former finance minister said he had come to reaffirm and even strengthen the so-called "special relationship".
"It is firmly in the British national interest that we have a strong relationship with the United States, our single most important bilateral relationship," he said, hailing shared values and history.
But after he named several Iraq war skeptics to senior ministerial roles, apparent disquiet in London at US foreign policy and no mention of US-British involvement in the Gulf in Brown's pre-visit statement, doubts remain.
Brown's spokesman Michael Ellam told reporters in London on Sunday that Iraq, which controversially united Bush and former British prime minister Tony Blair in military action in 2003, would still be up for discussion. - DDNEWS India
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