The Trump administration is considering issuing sweeping travel restrictions for the citizens of dozens of countries as part of a new ban, according to sources familiar with the matter and an internal memo seen by Reuters.

Damir Ortiz, a 10-year-old with leukemia and a rare genetic disease that has caused a tumor in his left eye, was medevaced Wednesday from Cuba to the Nicklaus Children’s Hospital in Miami, after overcoming bureaucratic obstacles and the reluctance of the Cuban government.

Cuba could be added to the "red list" of countries facing a total travel ban, according to CBS Miami news partner The Miami Herald which also reported that Haiti would be put on a less restrictive list.

The Trump administration considers visa restrictions on 41 countries, including Pakistan, citing security risks.

When asked about the travel ban, a State Department spokesperson said the agency “does not comment on internal deliberations or communications.”

President Trump’s first-term policy grew out of his 2015 campaign call to bar Muslims from entering the country and evolved amid court battles.

Cuba has yet to discuss migration with the Trump administration, Vice Foreign Minister Carlos Fernandez de Cossio told Reuters, even as the U.S. plows ahead with a vast immigration crackdown that could leave many Cubans at risk of deportation.