Despite attempts by Russia to forestall US airstrikes and protests on his doorstep President Obama continues to make the case for action in Washington.
Senators are gathering for discussions ahead of a vote which could define his Presidency.
ITV News Washington Correspondent Robert Moore reports:
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More action is needed urgently to counter the growing effects of extreme climate change, the Government has been warned.
Hotting up for all of us in the next couple of days. As we drift into July and the heat and humidity levels rise.
Talks are ongoing because both sides realise that there is no good outcome to this referendum.