The legislation keeps some House provisions, like new Medicaid rules, while making significant changes in other areas, including Medicare and the state and local tax deduction.

The GOP megabill now under Senate consideration threatens healthcare insurance for more than 1 million seniors who rely on Medicare.

The Republican-backed "One, Big, Beautiful Bill" has made a lot of headlines in recent weeks. The bill, intended to deliver on some of President Donald Trump's major campaign promises, includes things like no taxes on tips or overtime pay as well as new rules limiting some immigrants' access to various types of government aid.