UPDATE: Jan 23 at 5:07 p.m. EST
A Senate committee narrowly approved President Trump's nominee for Secretary of State, Rex Tillerson on Monday, according to NBC News.
Tillerson must still pass a vote in the full Senate.
UPDATE 10:33 a.m. EST: Sen. Marco Rubio said he will support Secretary of State nominee Rex Tillerson, but detailed a lengthy list of "troubling" stances Tillerson held, including his need for more information on human rights abuses worldwide.
"I must balance these concerns with his extensive experience and success in international commerce, and it is my belief that the president is entitled to significant deference when it comes to his choices for the cabinet," Rubio wrote in a statement.
Here's Rubio's full statement.
Rubio's support makes Tillerson's confirmation as Secretary of State all but certain.
ORIGINAL STORY: The Senate Foreign Relations Committee will vote on President Trump's nominee for Secretary of State, Rex Tillerson, on Monday.
On Sunday, Sens. John McCain (R-AZ) and Lindsey Graham (R-SC) both announced they would vote for Tillerson despite past skepticism.
"This wasn't an easy call," McCain said on ABC's "This Week" on Sunday. "But I also believe that when there's doubt, the president ... gets the benefit of the doubt."
WATCH | All eyes are on Sen. Marco Rubio (R-FL). He clashed with Tillerson during his initial Senate hearing, angered that Tillerson would not call Russian President Vladimir Putin a "war criminal." Tillerson's past business ties to Russia as CEO of ExxonMobil have also drawn criticism.
If Rubio votes no and the committee does not recommend Tillerson, the vote could go directly to the Senate floor. A "no" vote from Rubio may draw criticism from other Republicans.
WATCH | Tillerson's Senate hearing last week drew protests.
Sen. Ben Cardin, top Democrat on Foreign Relations committee, will vote "no" on Rex Tillerson's Sec. of State nomination— Phil Mattingly (@Phil_Mattingly) January 23, 2017
Somes conservatives opposed Tillerson due to his Russia ties.
The Associated Press contributed to this report.