Constitutional challenges to the National Labor Relations Board may end up before the Supreme Court, with grave implications for workers and unions.

Attorneys for Amazon and Elon Musk’s SpaceX argued in a federal appeals court Monday that the National Labor Relations Board’s structure is unconstitutional, advancing a legal fight that may last into the Trump administration where Musk is expected to oversee bureaucratic cost-cutting.

At the time, The New Republic reported that his behavior was not “just cruel, it’s dangerous.” Indeed, CNN reported Wednesday that those Musk singled out have been inundated with hate, leading others to fear that they too will have Musk devotees sicced on them.