Miguel Díaz-Canel addressed crowds in Havana the US is attempting to break down Cuba’s political system.
He said America aims for full control through Cuba.
Díaz-Canel branded US policies a case of political genocide during July 26 events.
He stressed this is a menace to Cuba’s right to govern.
Raúl Castro was absent from the largest rally.
Tensions are elevated as a result of sanctions and American political pressure.