Both chambers are expected to vote on the bill Monday and Tuesday. Lawmakers hope to send it to President Donald Trump's desk by Christmas.
Members of the House and the Senate need to resolve one big issue to reconcile their versions of the tax bill - the Obamacare individual mandate.
Sen. John Cornyn said Friday morning the Senate has enough votes to pass the bill.
McCain confirmed his support for the bill in a statement Thursday.
According to a report from the Congressional Budget Office, the tax bill could negatively affect Americans in the lowest income brackets.
The House passed its Tax Reform and Jobs Act, which could be the first major shake-up to the U.S. tax system in over 30 years.
Lawmakers in the House released their plan, dubbed the Tax Cuts and Jobs Act, on Thursday.
The New York City mayor says the "millionaires tax" would provide a steady source of funding.
The "T-Charge" is part of the city's larger plan to improve its air quality.
Roy Moore may have received a hefty salary from a charity he founded - even though he'd said he didn't take a "regular salary" from the organization.
Lots of studies have found links between e-cigarette use and tobacco addiction, but some warn that those links aren't all that strong.
Cigarette taxes can raise money while getting people to quit smoking. But researchers say doing this can cause more people to enroll for food stamps.