Miguel Diaz-Canel dismissed calls for his resignation during an interview with NBC News while asserting that his leadership is a mandate from the Cuban people.The Cuban president criticized the US government for maintaining hostile policies and an energy blockade that has severely damaged health and transportation sectors.Donald Trump and Marco Rubio have continued to pressure the island for regime change by describing its economic and political systems as complete failures.Russia recently delivered 730,000 barrels of oil to Havana to alleviate fuel shortages caused by the loss of Venezuelan supplies and American sanctions.