Most juicily, the Android phone—oh, let’s just call it “Trump”—is much, much angrier. By Robinson’s calculations, it uses 40-80 percent more negative words in tweets than the iPhone, including Trump mainstays like “badly,” “crazy,” and “weak.” Tweets from that device frequently evoke sadness, fear, anger, and disgust, according to Robinson’s language processing, while the iPhone is more likely to express anticipation, trust and joy.

Plus, the iPhone tweets out event times. That’s a staffer job. C’mon.

So I got curious. If tweets from the Android phone represent Trump’s contributions to his Twitter account, and the iPhone signals his staff’s input, how much is the New York billionaire actually tweeting these days? As the stakes grow higher—and flubs more damaging—has Trump’s campaign locked him out of his account for his own safety?

To figure this out, I needed to grab as many of Trump’s tweets as I could, preferably from the start of his campaign. Turns out this is pretty hard: Twitter clamps down on your ability to download tweets programmatically after 3,000 or so, which only took me back to December. I gave the social media company a call, but was told it would probably cost thousands to extract the data I needed.

So I turned to Oren Tsur, a visiting scholar at Harvard and associate professor at Ben Gurion University in Israel. He’s written about Trump’s Twitter account before and has been scraping the candidate’s tweets since 2015. With his help, I scanned his archive and matched it with more current data—resulting in some 6,000 tweets—and counted the number of times @RealDonaldTrump tweeted from each device, grouping by month. If you convert each month to a percentage, you get this:

If the Trump-Android proxy holds true, the Republican nominee’s participation in his own Twitter account has dropped sharply over the past year. From July 2015 to October, Trump largely ruled the account, with up to three-quarters of @RealDonaldTrump tweets coming from the Android phone. The staff takeover began in November, growing to around 50 percent of tweets before plateauing through the early primary months. But the last month has seen another major shakeup. So far in August, almost two-thirds of his tweets have been sent from an iPhone, suggesting a serious crackdown by the campaign staff.

(Note: A number of readers have asked whether the Android phone is actually tweeting less, or if the iPhone is just tweeting more, diluting Trump’s share. Perhaps Trump is just being out-talked by an effective campaign staff? Answer: Trump is indeed sending fewer tweets from the Android device. He posted an average of 371 tweets per month from July through December; that average is down to 200 per month in 2016, not counting August. The iPhone’s tweeting has also ticked up substantially.)