The Twitter “purge” is underway, and not even the biggest accounts, from President Donald Trump to President Barack Obama, can escape without losing a healthy chunk of their followers.

The social media giant began Thursday removing “locked” accounts, which have been made inactive until further verification by Twitter. The move comes one day after the company announced that prominent accounts could see a “significant drop.”

Trump, perhaps the most notorious Twitter user on the planet right now, saw his follower count drop by roughly 400,000 people to 53 million followers on Thursday — but the purge appears to be ongoing and that number could increase dramatically. His predecessor Obama was hit even harder, falling by more than 2.5 million followers in the past 24 hours to 101 million followers.

Twitter noted on Wednesday locked accounts are different from spam and bot accounts — two other issues that have plagued the platform — in that they were usually started by “real people,” but the company is unable to verify they’re still being run by their initial creators.

•Excerpted from Yahoo News