With Sens. Rand Paul and Thom Tillis opposed to the package, GOP leaders can afford only one more defection. And multiple Republicans aren't yet sold on the measure.

Although Vice President JD Vance's arrived on Capitol Hill Tuesday morning, it is unclear if GOP senators may see some sort of finish line for the ongoing vote-a-rama session in regard to President Donald Trump's legislative agenda.

Majority Leader John Thune (R-South Dakota) conceded early Tuesday that he did not know if he had the votes yet to pass the measure.