President-elect Trump Issues Stern Tweet to Post-Castro Cuba

U.S. President-elect Donald Trump issued a stern tweet to Cuba on Monday as the island officially began a period of public mourning for former President Fidel Castro and American Airlines inaugurated its first commercial flight from Miami to Havana.

“If Cuba is unwilling to make a better deal for the Cuban people, the Cuban/American people and the U.S. as a whole, I will terminate deal,” Trump tweeted on Monday morning. It was not immediately clear which aspects of the relationship between the two countries he was referring to in his social media post.

Appearing on "Face The Nation," Florida Sen. Marco Rubio on Sunday said that the U.S. should do everything possible to encourage the post-Castro Cuba to move toward democratic reforms.

“I believe it is in our national interest to see democracy take hold on the island of Cuba,” Rubio said on the CBS show. “We should examine our foreign policy, including all of the changes that president Obama made in that lens and through that lens.”

The historic thaw in relations was initiated two years ago and culminated with the re-opening of embassies that had been shuttered for more than five decades in the United States and its island neighbor.

On Monday, the first commercial American Airlines flight bound for Havana departed Miami International Airport at 7:23 a.m. and arrived at 8:30 a.m. at José Martí International Airport, according to American.

Castro died on Friday at 90, sparking celebrations throughout the Cuban-American community in Miami and other parts of Florida, where there is a large population of Cuban immigrants.

Consistent with Castro's wishes, his body was cremated on Saturday.

Singer Gloria Estefan took to social media on Saturday to defend the celebrations in her adopted city.