And then they take that stuff, and they sell it at the dollar stores and put the money in their pocket," Mr Rubio said.Mr Rubio, a Cuban-American and vociferous critic of the government in Havana, said that the US was hoping to avoid the use of force.The indictment in Miami of Mr Castro over a 1996 downing of two aircraft raised speculation that Mr Trump could use the charges as a pretext to attack the island and seize him."The president always has the option to do whatever it takes to support and protect the national interest and national security of the United States," Mr Rubio said."That said, our preference is always a diplomatic solution," he said."I'm just being honest with you, you know, the likelihood of that happening, given who we're dealing with right now, is not high."But if they have a change of heart, you know, we're here And in the meantime, we'll keep doing what we need to do."But Mr Rubio also made clear he believed Cuba posed a threat."Cuba not only has weapons that they've acquired from Russia and China over the years, but they also host a Russian and Chinese intelligence presence in their country, not far from where we're standing right now," he said."So Cuba has always posed a national security threat to the United States."Mr Rubio's comments came on the same day the US Supreme Court ruled businesses could sue for compensation in a case that stemmed from the Cuban government's decision to seize American assets in 1959.The justices, in an 8-1 ruling, set aside a lower court's decision to throw out the judgments against Carnival, Norwegian Cruise Line Holdings, Royal Caribbean Cruises and MSC Cruises, which were sued by a US company that had built the port facilities before the Cuban revolution.The company filed suit under the Helms-Burton Act