After one the largest firefighters’ unions incited Trump’s rage by coming out in favor of his potential 2020 election opponent Joe Biden, the president responded by retweeting around 60 messages of support from those who, he presumed, disagreed with their decision.

One of those tweets came from user @gIamourizes, who claimed to be the wife of a supportive New York firefighter, but in actuality had another message for the president.

At the same time the ‘supportive’ message was suddenly turned into quite the opposite, the user added insult to injury by changing their profile picture to a plug for Democratic party presidential contender Bernie Sanders.

After catching on, Trump deleted the retweet, but not before the foul-mouthed troll garnered some 10,000 likes and numerous comments.