Obama judge blocks deportation of detainees over Trump refugees, judge replaced a George W. Bush nominated judge

This Obama judge was confirmed during the last congress when the Republicans controlled the Senate.  From The Hill newspaper:

U.S. District Court Judge Ann Donnelly ruled in favor of a habeas corpus petition filed by the American Civil Liberties Union (ACLU) on behalf of two Iraqi men who were detained at John F. Kennedy International Airport on Friday after Trump signed his order. 

Donnelly, who was nominated by former President Barack Obama and confirmed to her judgeship in 2015, ruled in the Eastern District of New York that "there is imminent danger that, absent the stay of removal, there will be substantial and irreparable injury to refugees, visa-holders, and other individuals from nations subject" to Trump's order. 

“This ruling preserves the status quo and ensures that people who have been granted permission to be in this country are not illegally removed off U.S. soil," said Lee Gelernt, deputy director of the ACLU’s Immigrants’ Rights Project. . . .

Judge Donnelly replaced a judge nominated by George W. Bush, Sandra Townes.  How a delay of a couple of weeks or even a month would have done "substantial and irreparable injury" isn't obvious.