The centrepiece of Barack Obama's trade agenda faces a key vote in the US Senate on Tuesday, as members of the President's own party move to block legislation that would grant him so-called 'fast track' authority on an important Pacific trade deal.
The bill would pave the way for the sweeping 12-nation Trans Pacific Partnership, but liberals are worried it could get rid of American jobs, while some Republicans aren't keen to hand the President a victory.
Lorna Shaddick reports from Washington.
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