Moments after Sen. Richard Blumenthal (D-Conn.) appeared on CNN’s New Day to express concern over the administration’s efforts to crack down on leaks by targeting journalists, President Donald Trump took to Twitter on Monday to blast the senator as a “phony Vietnam con artist.”

Interesting to watch Senator Richard Blumenthal of Connecticut talking about hoax Russian collusion when he was a phony Vietnam con artist! — Donald J. Trump (@realDonaldTrump) August 7, 2017

Never in U.S.history has anyone lied or defrauded voters like Senator Richard Blumenthal. He told stories about his Vietnam battles and…. — Donald J. Trump (@realDonaldTrump) August 7, 2017

…conquests, how brave he was, and it was all a lie. He cried like a baby and begged for forgiveness like a child. Now he judges collusion? — Donald J. Trump (@realDonaldTrump) August 7, 2017

The attack was an apparent reference to Blumenthal’s history of misleading statements regarding his war service. Like the Connecticut senator, Trump also received five military deferments that allowed him to escape service in the Vietnam War. During an interview with Howard Stern, Trump once called his sexual conquests while avoiding sexually transmitted diseases his own “personal Vietnam.”

https://www.youtube.com/watch?v=q1wyTNvaDdI

Blumenthal is a frequent critic of the president and was on air Monday morning to discuss the Russia investigation and the “chilling effect” the Justice Department’s war on leakers could have on the press. The president has made a habit of using his Twitter account to take aim at his detractors shortly after they appear on cable news networks.

On Monday, Trump also continued lashing out at “fake media” outlets, including the New York Times, CNN, and the Washington Post, for reporting on the Russia scandal rather than on his administration’s successes.

The failing @nytimes, which has made every wrong prediction about me including my big election win (apologized), is totally inept! — Donald J. Trump (@realDonaldTrump) August 7, 2017

In 2010, the New York Times was the first outlet to report on Blumenthal’s problematic statements about his Vietnam service during his run for the Senate.