On April 18, 1985, a few months after taking his Senate seat, Kerry and Senator Tom Harkin of Iowa traveled to Nicaragua and met the country's president, Daniel Ortega. Though Ortega had won internationally certified elections, the trip was criticized because Ortega and his leftist Sandinista government had strong ties to Cuba and the USSR and were accused of human rights abuses. The Sandinista government was opposed by the right-wing CIA-backed rebels known as the Contras. While in Nicaragua, Kerry and Harkin talked to people on both sides of the conflict. Through the senators, Ortega offered a cease-fire agreement in exchange for the U.S. dropping support of the Contras. The offer was denounced by the Reagan administration as a "propaganda initiative" designed to influence a House vote on a $14 million Contra aid package, but Kerry said "I am willing..... to take the risk in the effort to put to test the good faith of the Sandinistas." The House voted down the Contra aid, but Ortega flew to Moscow to accept a $200 million loan the next day, which in part prompted the House to pass a larger $27 million aid package six weeks later.

When did Kerry visit Nicaragua?