The Senate narrowly passed President Trump's massive tax and spending bill Tuesday after a marathon series of amendment votes that stretched more than 24 hours, delivering a major victory for the president and bringing the signature piece of legislation of his second term one step closer to his desk.

After a late shift by Senator Lisa Murkowski to yes, the legislation now returns to the House, where its passage remains far from certain.

The White House has said workers benefiting from the deduction could see up to $2,000 in annual federal tax savings.