Miguel Díaz-Canel spoke to crowds in Havana the US is trying to undermine Cuba’s political system.
He announced America aims for total control through Cuba.
Díaz-Canel branded American policies a form of political genocide during July 26 events.
He warned this is a danger to the country's sovereignty.
Raúl Castro was absent from the main rally.
Tensions remain high due to sanctions and American political pressure.