First it was Musk.

The Biden administration from the beginning refused to acknowledge Tesla's contribution to electric vehicles, instead promoting Ford and GM's efforts.

Why the president and the world's richest man did not see eye to eye was puzzling for Musk fans. Their agendas overlap: climate change, innovation and jobs creation. So what's the issue?

It is unions.

The president is a proponent of unionisation. Elon Musk on the other hand has worked hard to ensure no unions in his sprawling operations.

Now its Bezos' turn.

The Amazon founder has taken on Biden publically over the last few days over taxes and inflation. But the underlying cause seems to be the unionisation efforts at Amazon.

The lines are clearly divided. What happens next will determine Biden's legacy. Will he be able to rein in the billionaires?