Last November was a good time to be a Tesla bull.

On the heels of President Donald Trump's return to the White House, Tesla's stock price surged to some of its biggest heights in several year. Investors relished the idea of the Trump administration clearing out any regulatory hurdles for Elon Musk, the president's biggest single campaign financier. And the Trump-Musk partnership seemed poised to be a positive one, with the Tesla CEO taking time away from his various businesses to lead an effort to unilaterally cut billions of dollars in federal spending. 

But now, not even six months into Trump's second presidency, the relationship seems to be imploding in public.