Venezuelan President Nicolas Maduro, who has stepped aside from accusing the U.S. of trying to undermine his socialist country and readying his military in the event of a U.S.-based attack, is preparing to give President Barack Obama a gift.

When the two world leaders see one another at a regional summit next month, Maduro hopes to hand over to the U.S. president a petition containing millions of signatures denouncing U.S. aggression.

As reported by The Associated Press, Venezuelans have for the past week been lining up in plazas, government offices and even prisons to add their signatures to a manifesto against the Obama administration.

The manifesto is a screed against Washington’s recent decision to sanction seven Venezuelan officials over human rights abuses that took place during last year’s anti-government opposition party protests.

The more than 4 million signatures call on Obama to reverse the order.

Maduro’s goal is to collect 10 million signatures before going to the Summit of the Americas, which takes place in Panama on April 10-11.

Foreign Minister Delcy Rodriguez announced on Friday the signatures would be presented at the summit.

Politically, Maduro is a divisive figure even in Latin America.

Costa Rica recently fired its ambassador in Venezuela after the man gave an interview in which he defended the Venezuelan government.

As reported in Reuters, the Costa Rican President Luis Guillermo Solis said his government did not share the opinions of ambassador Federico Picado who gave an interview with local newspaper La Nacion.

Costa Rican Foreign Minister Manuel Gonzalez said, "The content of the statements and the possibility of giving an interview was not previously discussed."

In the interview, Picado defended the decree powers that Venezuelan's parliament granted Maduro after President Barack Obama earlier this month declared Venezuela to be a threat to U.S. national security.