Colombian lawmakers voted Tuesday to call a referendum on whether the conservative US ally should be allowed to seek a third straight term.
It is responsible for economically troubled South Ossetia and may have spurred the European Union to seek alternative sources of energy.
Manuel Zelaya's visit with President Calderón could mark a new strategy to distance himself from his leftist ally, Hugo Chávez.
Exiled President Zelaya has set up camp on the Nicaraguan border to keep up pressure on interim government.
Deposed President Zelaya now says he will return Friday. Honduras's interim leader has refused to allow Zelaya back.
Nicaragua's leftist leader Daniel Ortega says constitutional limits on presidential terms stand in the way of 'direct democracy.'
At the close of the Civil War, a unique moment in US culture.
Costa Rican President and Nobel Peace Prize winner Oscar Arias will begin leading talks today between ousted Honduran President Manuel Zelaya and the interim government.
President Hugo Chávez, an avowed socialist and critic of the United States, has emerged in the unlikely role as the leading champion of democracy for Honduras.
Ousted President Manuel Zelaya is set to arrive back in the country Sunday, a move some say could provoke violence.