In November 2017, Blumenthal discussed the decision of the United States Department of Justice to classify RT as a "foreign agent" in an interview with Tucker Carlson on Fox News. He said to Carlson: "I go on RT fairly regularly, and the reason I do so is because, while the three major cable networks are promoting bombing and sanctioning half the world, at least the non-compliant nations, RT is questioning that." Charles Davis in an article for "New Politics" stated in 2018 that Blumenthal is "found almost every week defending Russian foreign policy on platforms such as RT and "Sputnik"", and that Blumenthal has defended Russia's role in the Syrian Civil War.