Filed at 5:36 p.m. ET WASHINGTON (AP) -- Questioning the motives of a ``desk-bound president who assumes the garb of a warrior,'' Democratic Sen. Robert Byrd on Tuesday reproached President Bush for flying onto an aircraft carrier last week to declare an end of major fighting in Iraq. ``I am loath to think of an aircraft carrier being used as an advertising backdrop for a presidential political slogan, and yet that is what I saw,'' Byrd said on the Senate floor. Byrd, 85, of West Virginia, is the Senate's most senior member and was one of the most outspoken critics...