Paraguayans are voting for president, congress and governors in elections they hope will end the country's isolation from regional groups that challenged last year's impeachment of President Fernando Lugo as a threat to the democracies of neighboring countries.

Most pre-election polls are giving the lead in Sunday's contest to wealthy businessman Horacio Cartes of the Colorado Party. Leading challenger Efrain Alegre of the Radical Liberals says he might not accept the results until votes are certified in May.

The initial count is to be announced Sunday night by Paraguay's Supreme Electoral Court.

Nobel Peace Prize Winner laureate Oscar Arias is leading an observer mission from the Organization of American States. He says he has complete confidence in the results that will be released by the electoral court.