Donald Trump.

California Democratic Congressman Ted Lieu on Friday asked the House Oversight Committee to launch an investigation into President Donald Trump’s use of an insecure Android smartphone. Trump’s well-documented attachment to the device is, Lieu says, a threat to national security.

“Cybersecurity experts universally agree that an ordinary Android smartphone, which the President is reportedly using despite repeated warnings from the Secret Service, can be easily hacked,” reads Lieu’s letter in part.

That inherent risk is why the President is issued a specially-designed secure cell phone. But that phone reportedly lacks many basic functions. That almost certainly includes President Trump’s favorite mobile app, Twitter.

Trump was open about his resistance to ditching his…