Aides said Trump had personally requested her release in a meeting April 3 with Egyptian President Abdel Fattah al-Sisi but had done so privately and made no public mention of her case. When Egyptian President Abdel-Fattah el-Sissi visited President Trump at the White House earlier this month, officials said Hijazi's case would be among the topics of discussion between the two governments.
USA officials had unsuccessfully advocated for Aya Hijazi's release for years. Both had been in prison since May 1, 2014 on charges of child abuse and trafficking, which USA officials dismissed as false, the Post adds.
In 2015, Hijazi's mother told NPR that after her daughter was arrested, the children she used to help are "back on the streets".
Ms Hijazi, a U.S. citizen with dual nationality, and her Egyptian husband, Mohamed Hassanein, set up the Belady Foundation in 2013 to aid street children.
She was flown to Joint Base Andrews, the US military airfield in the suburbs of Washington, D.C.
Hijazi was accompanied on the flight by Dina Powell, the deputy White House national security adviser for strategy.
On Friday, Secretary of Defense James Mattis visited another key Middle-East ally - Israel.
Hijazi was detained for 33 months - far longer than the 24-month maximum allowed under Egyptian law that a person can be held for before trial.
This is especially true when you know the real story of Hijazi, who formed a non-governmental organization called Belady whose entire objective was to help street children improve their lives.
By the way, the aforementioned Barack Obama was president for 30 of the 33 months this US citizen sat in an Egyptian prison on absurd charges.
Egypt, under President Sisi's regime, has serious problems when it comes to excessive force by officials, lack of due process and suppressed civil liberties, according to the State Department, and Hijazi's unjust imprisonment was seen by many human rights activists as representative of larger problems in the country.
A USA defense official said Mattis' meetings with Sisi and Egypt's defense minister had focused on building trust to allow for stronger military ties. Mursi, a Muslim Brotherhood member, had been elected the previous year.
At that meeting, Trump described the el-Sisi's leadership as "fantastic" and offered the USA government's "strong backing".
It wasn't until Trump stepped in and reset American-Egyptian relations that any headway was reached.