Trump’s ‘Big Beautiful Bill’ Stumbles in Senate as Musk Ramps Up Bid to ‘Kill’ It

President Donald Trump’s sprawling tax-and-spending proposal—touted as the centerpiece of his second-term agenda—is facing intensifying resistance in the Senate, as fresh concerns about its impact on the deficit and a ramped-up campaign by Elon Musk to torpedo the entire package threaten to derail the legislation’s fragile path to passage.

At the center of the turmoil on Trump’s “One Big Beautiful Bill” is a sobering new assessment from the nonpartisan Congressional Budget Office, which...