President Trump faces the challenge of convincing Republican senators, global investors, voters and even Elon Musk that he won't bury the federal government in debt with his multitrillion-dollar tax breaks package.

Elon Musk on Tuesday made his sharpest attack yet on President Donald Trump’s sweeping tax-and-spending package making its way through Congress, supporting Republican fiscal hawks who say the legislation would explode the national debt and do too little to rein in government spending.