The former vice president's victories were another blow to Vermont Senator Bernie Sanders, whose early strength has evaporated as African Americans and working-class Whites across the country have sided with Joe Biden.
Markets panicked as the peso closed at 57.30 to the dollar, a drop of 18.76 per cent from its Friday closing figure, while the Merval index crashed 38 percent by close.
Trump rallies Republicans by formally accepting the nomination for president at the Republican Party Convention
Republican presidential candidate Donald Trump and Democrat Hillary Clinton cruise to victories in nominating contests in their home state of New York
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