With just days until Senate GOP leaders want to start voting, they have been hit with a mathematical double-whammy: Tax writers are proposing a package that’s hundreds of billions of dollars more costly than what House Republicans have proposed, while senators struggle to finalize a larger package of spending cuts to offset it.

President Donald Trump and Republican leaders are betting that key GOP holdouts will buckle under enormous pressure to pass his sweeping agenda within days – even as a number are warning they’re prepared to sink the multitrillion-dollar measure without major changes.