Barton: Next Congress will address online privacy

The comments came after Facebook responded to a letter from Barton and Rep. Edward MarkeyEdward (Ed) John MarkeyDem calls for CDC to immediately begin gun violence research Historian Meacham: Bolton 'raises the stakes for military action around the world' Democrats lay into Trump's pick of Bolton for national security adviser MORE (D-Mass) about online privacy issues. Markey also said he will keep working on the issue.

"With privacy legislation under consideration by the Energy and Commerce Committee, I will continue to work with my colleagues to ensure that Facebook personal user data isn’t siphoned off and sold to a data broker who cannot be unfriended,” he said.

Facebook has said it did not sell user data. Rather, third party applications shared a limited amount of user information with marketers.

Facebook spokesman Andrew Noyes responded to the remarks on Wednesday.

"We were happy to provide Reps. Markey and Barton with answers to any questions they had and look forward to working with them in the future. Facebook has never sold and will never sell user information," he said.

"We also have zero tolerance for data brokers because they undermine the value that users have come to expect from Facebook," he said. "To restate our policy, developers may not pass any data from Facebook to data brokers, and we are now including anonymous identifiers in this protected category of Facebook data."