US President Donald Trump threatened his former advisor Elon Musk with "serious consequences" Saturday if the tech billionaire seeks to punish Republicans who vote for a controversial spending bill.

The comments by Trump to NBC News come after the relationship between the world's most powerful person and the world's richest imploded in bitter and spectacular fashion this week.

The blistering break-up -- largely carried out on social media before a riveted public on Thursday -- was ignited by Musk's harsh criticism of Trump's so-called "big, beautiful" spending bill, which is currently before Congress.

Some lawmakers who were against the bill had called on Musk -- one of the Republican Party's biggest financial backers in last year's presidential election -- to fund primary challenges ag

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