Security, immigration could overshadow Obama's attempts to focus on economy on Mexico trip

WASHINGTON - President Barack Obama is seeking to refocus economic relations between the U.S. and Mexico, even as fresh questions about security co-operation threaten to cast a shadow over the president's visit to the southern neighbour.

Obama will also use his three-day trip beginning Thursday to highlight the immigration overhaul moving through Capitol Hill, both for an audience in Latin America and for those back home in the U.S. The president will also visit Costa Rica.

The centerpiece of the trip will be Obama's meetings with Mexican President Enrique Pena Nieto (ayn-REE-kay PAY-nya nee-YEH-toh.

Pena Nieto has moved to end the widespread access it gave U.S. security agencies helping fight drug trafficking and organized crime. The changes mark a dramatic shift from the policies of Pena Nieto's predecessor, Felipe Calderon (fay-LEE'-pay kahl-duh-ROHN').