Argentina's newly established leading presidential contender is throwing doubt on a newly signed regional trade pact with Europe and also feuding with one of his country's partners in the deal, the far-right president of neighboring Brazil.
Alberto Fernández thumped President Mauricio Macri by 15 percentage points in Sunday's primary voting — making his slate, which includes ex-President Cristina Fernández as his running mate, the clear leader for October's main
election and prompting a stock market collapse among investors worried about their left-leaning populist policies.
Fernández raised doubts Monday night about the European Union's trade deal with the South
American trade bloc Mercosur that was signed in June but not yet ratified.