Here's what to know about the feud between Donald Trump and Elon Musk over the president's "Big Beautiful Bill."

From centrists worried about Medicaid cuts to conservative hard-liners demanding steeper spending reductions, Senate GOP leaders face a tricky balancing act.

While the aim of the sprawling 1,000-page plus bill is to preserve an estimated $4.5 trillion in tax cuts that would otherwise expire at year's end if Congress fails to act — and add some new ones, including no taxes on tips — the spending cuts pointed at the Democratic-led programs are causing the most political turmoil.