"This bill proposes the largest tax cut in history. Hopefully, today we will achieve its final advancement in the Senate," the president told reporters at the White House, before leaving this morning for Florida to tour a future immigration prison known as the Alligator Alcatraz.

More than 24 hours later, the Senate has already issued 45 consecutive votes in the longest so-called 'vote-a-rama' in the history of that legislative body, a process in which senators vote on amendments to the bill, which seeks to extend the budget cuts from Trump's first term (2017-2021), impose greater restrictions on public spending and approve greater funds for defense and immigration control.

Until now, this record stood at 44 votes recorded in March 2008.

Vice President JD Vance arrived this morning at the Capitol to preside over the session and issue a possible tie-breaking vote on a future final vote, although it is not yet clear whether Republicans have all the support within their own party to pass the bill, which has been dubbed a “big, beautiful bill.”

Vance, a former senator from Ohio, will work with Senate Majority Leader John Thune to try to convince skeptics within the party.

To advance the legislation and send it back to the House, where it will also be debated before final approval, Republicans can only afford to lose the support of three of the 53 senators they have on the floor. The remaining 45 Democrats and two independents are expected to oppose the law.

Several hardline conservative Republicans have voiced their disapproval of the legislation's high cost, which would add $3.3 trillion to the public debt over 10 years, according to a new estimate from the Congressional Budget Office (CBO), a calculation that exceeds the $2.4 trillion in the version passed by the House on May 22.

On the other hand, a group of more moderate Republican senators are concerned about cuts to the Medicaid health plan for low-income people and the SNAP food assistance program, and the effects these limitations would have on their communities.

During the long night session, which is expected to extend into the day, senators voted on several of the provisions included in the text of the law, including the elimination of a provision that would have prevented states from regulating the development of Artificial Intelligence.

Once the mega-bill passes the After processing in the Senate, it will return to the House of Representatives, with a narrow Republican majority, which will review the approved changes and where legislators are also expected to work against the clock to meet the July 4th, Independence Day, deadline imposed by Trump for signing the legislation.