Some Democratic leaders and officials believe the combination of tax cuts and potential changes to some Americans' health care coverage could allow the party to recapture the anger and anti-Trump backlash that helped the party reclaim the House in 2018, after Republicans passed their tax package and repeatedly failed to repeal Obamacare.

Tax breaks in the megabill, like no taxes on tips and overtime, only apply to people at certain income levels.

The Republican-controlled Congress could soon give final approval to a sweeping tax and spending bill that incorporates many of President Donald Trump's top domestic priorities.