Timeline of Turmoil: The Rollout of Trump's Immigration Order

Why Trump's immigration executive order caused confusion and frustration.

A chorus of dissenters protested, while confused customs agents asked for clarity on how to proceed.

Civil rights attorneys filed legal challenges, and a federal judge in Brooklyn blocked deportations.

Soon, it emerged that some key members of Trump's own administration, as well as congressional leadership, had not been fully in the loop -- if at all -- on the scope and language of the action taken Friday afternoon.

Here's what we know about how the order was rolled out:

“We don’t want them here,” Trump said, standing at a podium flanked by Vice President Mike Pence and Secretary of Defense James Mattis. “We want to ensure that we are not admitting into our country the very threats our soldiers are fighting overseas.”

Hours after Trump signed his order, the public had not yet seen documents that would describe exactly how airports and government officials around the world would implement the new rules. At 6:58 p.m., the order was distributed to the White House press list.

So began a weekend of confusion and chaos as families wondered whether or not they would be reunited with loved ones, politicians struggled to respond to constituent concerns and airports scrambled to accommodate the new policy as protesters shouted chants against Trump in luggage terminals from New York to San Francisco.

As Trump signed his name to set the order in motion, immigrants and refugees were still flying in the air, unaware of what they would find once their flights landed in the United States.

Two Iraqi visa holders, Hameed Khalid Darweesh and Haider Sameer Abdulkhaleq, landed at Kennedy International Airport in New York on Friday night and were immediately detained by Department of Homeland Security officials. Lawyers for the two men, caught in a communications limbo between the White House and Department of Homeland Security, filed a writ of habeas corpus against Trump in Brooklyn Federal Court.

At airports on Saturday, the sound of protesters chanting against what they called Trump’s “Muslim ban” swelled as Republican leaders in Congress remained largely silent. During the signing of another executive order in the Oval Office, Trump defended his position when pressed by reporters. “It’s not a Muslim ban,” the president said, adding that the government was prepared for its implementation, “totally, totally,” and that “in the airports it’s working out very nicely.”

On Saturday night, as questions swirled about the fate of travelers stuck in airports, Judge Ann Donnelly of Federal District Court in Brooklyn ruled that detained people could not be forced back to their original destinations, writing “there is imminent danger that, absent the stay of removal, there will be substantial and irreparable injury” for individuals subject to the order.

Attorneys flocked to major U.S. airports to provide pro bono legal assistance for refugees and visa-holders trying to navigate the new order.

Among those speaking out on the Democratic side was Senate Minority Leader Chuck Schumer of New York who, his eyes welling with tears, demanded Trump rescind the “mean spirited and un-American” order.

Foreign leaders and CEOs also criticized the order.

The president issued a statement asserting that the order aims to keep the country safe. “To be clear, this is not a Muslim ban, as the media is falsely reporting. This is not about religion - this is about terror and keeping our country safe. There are over 40 different countries worldwide that are majority Muslim that are not affected by this order.”

But the order seemed to still be in flux on Sunday morning when White House Chief of Staff Reince Priebus during an appearance on “Meet the Press” said that the order did not apply to green card holders.

Reporting revealed that some of Trump’s own cabinet members were largely left in the dark. Department of Homeland Security John Kelly was in an airplane discussing timing for the order as Trump announced his plans on national television.

On Tuesday, Kelly pushed back on those reports during his first press conference. “We knew it was coming. It wasn’t a surprise," he said, adding that adjustments were made up to the last minute.

Secretary of Defense Mattis, who had stood next to Trump at the signing, had no input on the document. And a U.S. official said that acting Secretary of State Tom Shannon was "aware of" and "tracking" the executive order, but would not say when he actually saw the final version of the order or was able to offer his opinion.

Trump on Monday morning offered reasoning for why government officials weren't fully informed about the order's rollout. “If the ban were announced with a one-week notice, the "bad" would rush into our country during that week. A lot of bad "dudes" out there!” Trump tweeted.

But for some families from affected countries, the order has a serious cost.

Azzam Elias, a Syrian refugee who came to the United States in 1978, said one of his daughters is stuck in Lebanon. “I am a good citizen," Elias said. "I have my own business and own house and not my own children with me. It's hard to see people being killed right and left, and I can't save my own children.”

ABC News' Matt Claiborne, Aaron Katersky, Ben Siegel, Arlette Saenz and Justin Fishel contributed to this report.