The staggering and exceedingly public rupture in the world’s most consequential and unprecedented partnership was a long time coming. But the surreal state of suspended animation that consumed Washington as President Donald Trump and Elon Musk traded escalating blows on social media obscured a 48-hour period that illustrated profoundly high-stakes moment for the White House.

The bill faces strong headwinds among senators across the Republican spectrum, including fiscal conservatives who say it authorizes unsustainable spending.