What President Trump is supposed to be doing while he’s tweeting

President Trump is applauded by Vice President Pence and House Speaker Paul D. Ryan as he arrives to speak at a congressional Republican retreat in Philadelphia, on Jan. 26. (Jonathan Ernst/Reuters)

President Trump rose to the defense of his daughter Ivanka on Tuesday, after her clothing line was dropped by the retail chain Nordstrom.

My daughter Ivanka has been treated so unfairly by @Nordstrom. She is a great person — always pushing me to do the right thing! Terrible!

— Donald J. Trump (@realDonaldTrump) February 8, 2017

There are a lot of reasons that this was a questionable thing to tweet, starting with the fact that the president of the United States was using his time — and government resources, once he retweeted from @POTUS — to bolster his daughter’s business.

But then people started to notice something else: The tweet was sent at 10:51 a.m. Eastern, about 20 minutes after Trump was supposed to have been participating in his daily intelligence briefing, according to his published schedule.

Not only that, but the tweet was sent from an Android phone. Trump has an Android phone — apparently the same one he’s used for years. Wired called that device “very, very risky” given that he’s using an old phone that’s significantly vulnerable to hacking. This prompted another concern: Did Trump have that phone in the briefing with him? Was he carrying an insecure device with a microphone into one of the most secure places in the world?

The answer is probably…