DETROIT (Reuters) -The United Auto Workers Union said on Tuesday it has filed federal labor charges against Donald Trump and Tesla CEO Elon Musk over attempts to threaten and intimidate workers.

The action came after Musk and Trump held a two-hour conversation on social media platform X Monday night, during which the two discussed workers walking off the job to go on strike.

“You’re the greatest cutter,” Trump said during the conversation. “I mean, I look at what you do. You walk in, you just say: ‘You want to quit?’ They go on strike – I won’t mention the name of the company – but they go on strike. And you say: ‘That’s okay, you’re all gone.'”