On October 23, 2018, McCarthy tweeted that Democratic donors businessman George Soros, businessman Tom Steyer and former New York Mayor Mike Bloomberg, were trying to “buy” the upcoming election. McCarthy tweeted this a day after a pipe bomb was delivered to Soros' home. Steyer said McCarthy's tweet was a "straight-up antisemitic move" because the three Democrats are Jewish. A vandal threw rocks at McCarthy's office and stole equipment from it, reportedly in reaction to McCarthy's tweet. McCarthy later deleted the tweet.