The comments by Trump advisers Kellyanne Conway and Reince Priebus followed the death of former Cuban leader Fidel Castro. Castro’s younger brother, 85-year-old Raul Castro, took control in 2006, and later negotiated with Obama to restore diplomatic relations.

Priebus, Trump’s incoming chief of staff, said Trump would “absolutely” reverse Obama’s opening to Cuba unless there is “some movement” from the Cuban government.

“Repression, open markets, freedom of religion, political prisoners—these things need to change in order to have open and free relationships, and that’s what President-elect Trump believes, and that’s where he’s going to head, ” Priebus told Fox News Sunday.

Conway made similar remarks and noted that any diplomatic deal will have to benefit American workers.

“To the extent that President Trump can open up new conversations with Cuba, it would have to be a very different Cuba,” she told ABC’s This Week.

She added: “He wants to make sure that when the United States of America, when he’s president, engages in any type of diplomatic relations or trade agreements … that we as America are being protected and we as America are getting something in return.”

Conway said nothing on Cuba has been decided. But she noted that the U.S. is allowing commercial aircraft to do business with a repressive Cuban government and Cuban military. And she said the “first order of business” is to rally the international community around trying to free political prisoners.

While Obama opened some U.S. investment and travel to Cuba through executive order, vast restrictions tied up in the trade embargo remain at the insistence of Republican lawmakers.

Separate memorial services have been scheduled for Tuesday and later in the week in Cuba for Castro, and some world leaders and celebrities were expected to attend. As of Sunday, though, the White House had not said whether anyone from the U.S. government would attend.

Republican Sen. Marco Rubio of Florida, whose parents were born in Cuba, says he is heartened by Trump’s past hard-line rhetoric on Cuba.

Rubio told CNN’s State of the Union that the U.S. focus must be its own security and other interests and encouraging a Cuban democracy.

“We should examine our policy toward Cuba through those lenses,” he said. “And if there’s a policy that helps that, it remains in place. And if it’s a policy that doesn’t, it’s removed.”

During the campaign, Trump said he would reverse “concessions” to the Cuban government by Obama unless the Castro government meets his demands. On Saturday, while Obama offered condolences to Castro’s family and said the U.S. extends “a hand of friendship to the Cuban people,” Trump tweeted: “Fidel Castro is dead!”

Fidel Castro is dead!

— Donald J. Trump (@realDonaldTrump) November 26, 2016

Trump later released a statement noting his administration “will do all it can to ensure the Cuban people can finally begin their journey toward prosperity and liberty.”