According to the Miami Herald:
Rubio said he had issues with the way some Cubans are abusing the system.
“I don’t criticize anyone who wants to go visit their mom or dad or their dying brother or sister in Cuba,” he said. “But I am telling you it gets very difficult to justify someone’s status as an exile and refugee when a year and a half after they get here they are flying back to that country over and over again.”
More than 1 million Cubans have received U.S. residency since the law was enacted in 1966. But in recent years, it has come under increasing scrutiny, over questions of whether Cubans are leaving for economic reasons rather than political.
Immigrant-rights groups say it unfairly grants special status to Cubans, who get access to federal benefits the immigration overhaul would deny to millions of others.