President Donald Trump’s sweeping tariffs took effect Wednesday over the concerns of many of the nation’s billionaires, as even longtime supporters of the president—including Elon Musk—have expressed concern about the tariffs and their impact on the economy.

Elon Musk has hit out at US President Donald Trump’s tariff tsar, calling him a “moron” who is “dumber than a sack of bricks”. The billionaire slammed Peter Navarro, Trump’s senior counsellor for trade,

Elon Musk’s spat with President Trump’s trade advisor, Peter Navarro, is breaking out into an all-out war, with the world’s richest man calling the fellow senior staffer “a moron” on Tuesday. Mr. Musk has been subtly criticizing Mr.

Billionaires who backed Trump in the election are freaking out over his tariffs, but so far he isn't following their advice.

Hedge fund billionaires like Dan Loeb, Bill Ackman, and Stanley Druckenmiller have criticized the tariffs that have sent stocks tumbling.

President Donald Trump’s pick to run NASA sought to reassure US Senators on Wednesday that he wouldn’t abandon the agency’s multibillion-dollar push to put US boots on the moon in favor of Elon Musk’s longstanding goal of a human mission to Mars.