The Senate plans to hold a key test vote on President Trump's "big, beautiful bill" later Saturday, even as it's unclear whether the tax and spending measure has enough support to lift it over the hurdle.

Senate Republicans have sparred with each other and the parliamentarian over a variety of provisions in the sweeping legislation.

Republican leaders advance their modified version of Trump's bill, despite resistance from conservatives and moderates over Medicaid changes and other divisive policy tweaks.