NEW : Deal would permit non-U.S. troops to stay into 2009 . Comment: The session became so contentious that Parliament 's speaker threatened to resign , lawmakers said . Agreement would set July 31 withdrawal deadline for those troops . U.K. examining options in case Iraqi Parliament does n't OK deal . Sadrists oppose any extension of the presence of foreign troops in Iraq .
NEW : Deal would permit non-U.S. troops to stay into 2009 . Comment: Agreement would set July 31 withdrawal deadline for those troops . U.K. examining options in case Iraqi Parliament does n't OK deal . Sadrists oppose any extension of the presence of foreign troops in Iraq .