MEXICO CITY - Robert Zoellick, the U.S. choice to head the World Bank, warned Saturday that Venezuela's economic and political troubles were growing under President Hugo Chavez's leftist government. "It's a country where economic problems are mounting and we are seeing (that) on the political and press side it's not moving in a healthy direction," Zoellick told a news conference in Mexico City. He also suggested that the World Bank's influence would not suffer if Chavez goes through with his plan to pull Venezuela out of the lending institution. "If a country feels it doesn't need or want the services...