"I built this great military. I said, 'You'll never have to use it.' ?But sometimes you have to use it. And Cuba is ?next by the way," Trump said at the Future Investment Initiative summit in Miami Beach, Florida, on March 27. He then added: "But pretend I didn't ‌say ?that. Pretend I didn't."

After that, Trump said, "Cuba's next."

The Trump administration has opened up negotiations with elements of Cuba's leadership ?in recent weeks, and the president has previously hinted that military action could be possible.

Cuban leader Miguel Díaz-Canel has acknowledged that the country is in talks with the U.S. military in a bid to avert potential military confrontation. Cuba's economy has been battered ?by disruptions in ?oil imports, which ?it relies on to run power plants and transportation.

Díaz-Canel said in an address that the purpose of the talks was "to determine the willingness of both parties to take concrete actions for the benefit of the people of both countries," coming after Cuba said it would release 51 people from prison.

Prior to the U.S. operation to capture then-Venezuelan regime leader Nicolás Maduro in January, Venezuela had ?provided much ?of Cuba's oil needs, but Caracas's new government has ended those shipments. Earlier in March, Trump had said Cuba ?may ?be subject to a "friendly takeover," before ?saying, "It may not be a friendly takeover."

"They have no money. They have no anything right now," Trump also said outside the White House in February, referring to Cuba. "Maybe we'll have a friendly takeover of Cuba."

Trump has said that he would turn his attention to Cuba once the U.S. military operation in Iran is concluded.

"We could do them all at the same time," Trump said in remarks on March 6. "But bad things happen. If you watch countries over the years, you do them all too fast, bad things happen."

Cuba has been an adversary of the United States for decades, although there have been intermittent periods of engagement between the two countries. The United States has kept in place a trade embargo on the island for decades, prohibiting American businesses from engaging with Cuban interests, in part because the country held Soviet-made nuclear missiles during the 1962 Cuban Missile Crisis.