Candidate for Congress Francisco de Narvaez gestures during an interview, as part of the Reuters Latin American Investment summit, at his campaign headquarters in Buenos Aires, May 4, 2009. De Narvaez, a millionaire businessman who leads a congressional ticket of a dissident faction from the ruling Peronist party, will challenge the government in the country's biggest electoral battleground, the province of Buenos Aires, and is likely to face off with former President Nestor Kirchner in the June 28 balloting that will determine if Argentina's President Cristina Fernandez de Kirchner keeps her majority in Congress. REUTERS/Marcos Brindicci (ARGENTINA POLITICS ELECTIONS)