Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE is expected to recommend to President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE that he allow transgender troops to remain in the military.

Mattis will reportedly voice his support for allowing transgender troops to remain in the U.S. military in a meeting with President Trump this week, officials with knowledge of the issue told The Washington Post.

Mattis and Trump were scheduled to meet Wednesday, but the meeting was postponed.

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Trump announced in a series of tweets last July that he would bar transgender individuals from serving in the military. He later issued a memo that barred the enlistment of new transgender recruits and prohibited the Defense Department from paying for gender affirmation surgery.

The memo allowed for Mattis to determine how to deal with transgender service members already in the military.

Several courts have since blocked or partially blocked the ban, allowing the military to accept transgender recruits starting Jan. 1.

Mattis's recommendation on the issue was expected by Feb. 21.

Pentagon spokeswoman Dana White said Thursday that Mattis will provide his recommendation to Trump this week.

“This is a complex issue, and the secretary is taking his time to consider the information he has been given,” she said. “It’s an important issue, and, again, he sees all of his decisions through the lens of lethality. And as you said, it was a self-imposed deadline.”

Updated 4:55 p.m.