Backs against the wall - Trump victory casts pall over Mexico

People watch a broadcast of the U.S. presidential race between Democratic nominee Hillary Clinton and Republican nominee Donald Trump in a restaurant in Mexico City, Mexico November 9, 2016. REUTERS/Carlos Jasso

MEXICO CITY (Reuters) - Mexico was pitched into deep uncertainty by Donald Trump's U.S. election victory on Tuesday after a bitterly divisive campaign, raising the prospect of major clashes over trade, immigration and security.

The peso currency suffered its biggest fall in 22 years on fears Trump will stick to a campaign pledge to rewrite or dump a free trade treaty he says is loaded in Mexico's favour. Investors worry a trade fight could tip Mexico's economy into recession.