CARACAS, VENEZUELA – JANUARY 23: An opposition sings the National Hymn of Venezuela during a mass rally against Nicolas Maduro in Caracas, Venezuela on January 23, 2019. President Donald Trump recognized Juan Guaido, president of National Assembly, as interim president, just after Guaido declared himself interim president in front of the crowd. (Photo by Marcelo Perez Del Carpio/Anadolu Agency/Getty Images)