Some big names on Wall Street have waded in amid the amid the public breakdown of Elon Musk President Donald Trump's relationship. Billionaire investor Bill Ackman, who founded the hedge fund Pershing Square Capital,

For months, Tesla shareholders were tormented by Elon Musk’s role in the administration of President Donald Trump. But any relief brought by his formal government exit last week quickly turned to fear as the electric-vehicle maker’s chief executive traded barbs with his former boss.

By Saeed Azhar, Kanchana Chakravarty and Sukriti Gupta NEW YORK (Reuters) - Wall Street's stock indexes ended lower on Thursday in choppy trade as a slump in Tesla shares offset news of progress in tariff talks between U.