Miguel Diaz-Canel promised an impregnable defense of Cuba after Donald Trump threatened a US takeover of the island during a White House press briefing.The Cuban leader condemned the long-standing economic embargo and blamed Washington for a nationwide blackout that recently left millions without power.Although Marco Rubio denied reports of the US pressuring for leadership changes, Havana confirmed that diplomatic talks mediated by the Vatican are continuing.Russia expressed solidarity with the communist government as the island struggles to recover from an energy crisis and a magnitude 6.0 earthquake.