Elon Musk, a key ally of Donald Trump, is facing a tough time as shares of his electric vehicle company Tesla have taken a hit. The electric vehicle company has lost more than 50% of its market capitalization, equal to nearly $800 billion. Tesla’s stock has fallen every week since Musk joined the Trump administration as head of the so-called DOGE, which is engaged in a broad, controversial effort to reduce federal government spending and employee headcount.