Humberto Calderón Berti is a Venezuelan geologist, petroleum engineer, diplomat, politician and author, named in 2019 as ambassador to Colombia by disputed interim Venezuelan president Juan Guaidó during the 2019 Venezuelan presidential crisis, and welcomed by Carlos Holmes Trujillo, Colombia's foreign minister.

Juan Gerardo Antonio Guaidó Márquez is a Venezuelan opposition politician. He belonged to the social-democratic party Popular Will, and was a federal deputy to the National Assembly representing the state of Vargas. On 23 January 2019, the National Assembly declared that he was acting president of Venezuela and Guaidó swore himself into office, starting the Venezuelan presidential crisis by challenging Nicolás Maduro's presidency. In December 2022, opposition parties voted to dismiss Guaidó as interim president, choosing Dinorah Figuera as a successor on 5 January 2023 and ending Guaidó's presidential claim.