Since Election Day, many Trump campaign staffers have been huddled on a noisy floor in the campaign’s Arlington, Virginia, headquarters fielding hundreds of calls a day on a hotline the campaign set up as they try to find instances of voter fraud, multiple sources told ABC News.

But the hotline has turned into a nightmare for some, as staffers, some of whom have contracts that expire in the coming days, have been bombarded with prank calls from people laughing or mocking them over Biden’s win before hanging up, sources tell ABC News. Prank calling the Trump campaign’s hotline has already become a trend on TikTok, the social media network that was used earlier in the year in an attempt to tank the president’s rally in Tulsa by mass-requesting tickets.