Miguel Díaz-Canel spoke to crowds in Havana the US is attempting to destroy Cuba’s political system.
He announced Washington wants full control over the island.
Díaz-Canel called American policies a form of political genocide during July 26 events.
He warned this is a threat to Cuba’s right to govern.
Raúl Castro stayed away from the largest rally.
Tensions are elevated as a result of sanctions and US political pressure.