The United States Congress began tense deliberations Tuesday ahead of prospective votes on the Iran nuclear deal, as President Barack Obama gained sufficient Senate support to prevent Republicans' last-gasp efforts to torpedo his accord.
As lawmakers returned from summer recess, Senate Majority Leader Mitch McConnell said he would ask "all senators to be present in the chamber" to debate the merits and shortcomings of the international agreement aimed at preventing Iran from obtaining an atomic bomb.
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