In a week that began with the rekindling of an on-again, off-again feud between President Donald Trump and fellow billionaire Elon Musk, newly released sales figures show Musk-owned Tesla Inc. is continuing to lose its position of dominance in the global electric vehicle market.

Musk, who supported Trump's campaign and also served as an adviser to the White House, has criticized the tax and spending bill the president is pushing.

Shares of electric vehicle maker Tesla, which is headed by Elon Musk, slumped Tuesday as the war of words between billionaire and President Donald Trump over the big bill of tax breaks and spending cuts heats up again,