Singapore's prime minister says that American credibility is on the line over the Trans-Pacific Partnership trade deal.
Prime Minister Lee Hsien Loong says for America's friends and partners in the Asia-Pacific, ratification of TPP is "a litmus test of your credibility".
Lee was speaking at the US Chamber of Commerce ahead of a meeting on Tuesday with President Barack Obama at the White House.
Lee said that America is better off with its "doors open" to trade.
The TPP has been negotiated by the Obama administration, but is opposed by both the Democratic and Republican presidential nominees.
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Singapore is a signatory to the 12-nation pact, finalised in February. TPP would eliminate trade barriers and tariffs but critics say the pact undercuts American workers by introducing lower-wage competition.
