Vice President Mike Pence will postpone his trip to Egypt and Israel until after the Senate votes on the GOP's tax reform bill, according to a statement released by his team Monday.

"The largest tax cut in American history is a landmark accomplishment for President Trump and a relief to millions of hardworking Americans," Pence spokeswoman Alyssa Farah said via a written statement.

"The Vice President is committed to seeing the tax cut through to the finish line. The Vice President looks forward to traveling to Egypt and Israel in January," Farah continued.

Senate Republicans hold a 52-seat majority in the upper chamber and require 50 votes to pass the Tax Cut and Jobs Act without any Democratic support.

However, the GOP will be down one member ahead of the crucial vote Tuesday after Sen. John McCain, R-Ariz., returned to his home state over the weekend to continue his fight against an aggressive form of brain cancer.

Pence may be required to cast a tie-breaking vote should undecided senators announce they will not be supporting the proposed tax code overhaul legislation.

Pence's Middle East visit has also been complicated by ongoing demonstrations protesting Trump's decision earlier in December to recognize Jerusalem as the capital of Israel.

The vice president was scheduled to depart Tuesday.