GOP Sen. Rand Paul said Sunday that "the math doesn't really add up" on the cost of President Trump's "one big beautiful bill," outlining his opposition as the legislation moves to the Senate this week.

Senate Republicans will take control of the party’s mammoth tax and domestic policy bill when they return to Washington on Monday — and seek to win over a diverse group of GOP lawmakers agitating for changes to the legislation.

One Republican said there’s enough resistance in the Senate to halt Trump's "Big, Beautiful Bill" unless there are significant changes.