Several U.S. Republican lawmakers expressed concern over privacy violations on Sunday after media reports that a political consultancy that worked on President Donald Trump's campaign gained inappropriate access to 50 million Facebook users' data.

Republican Sen. Marco Rubio said he believed some internet companies have grown too fast to digest their responsibilities and obligations.

"So we'll learn more about this in the days to come. But yeah I'm disturbed by that," Rubio told NBC's "Meet the Press."