Donald Trump was commander in chief of the most powerful military in the world.
On the morning of July 26, 2017, he used Twitter to announce a major change in who would be permitted to serve in it.
In a series of three tweets, Trump declared that the United States government would no longer “accept or allow” transgender people to serve in the military “in any capacity.”
The announcement was sweeping.
The implementation plan was not.
Within hours, the White House was fielding basic questions about what the announcement meant for transgender troops already serving, whether deployed personnel would be removed, when the policy would take effect and exactly how the Pentagon was supposed to carry it out.
The answers had not yet been determined.
Trump had announced the destination before his administration had publicly explained how it intended to get there.
Three Tweets Change the Debate
Trump began his announcement shortly before 9 a.m.
He said that after consultation with “my Generals and military experts,” the government would not permit transgender individuals to serve in the military.
Trump cited what he described as the “tremendous medical costs and disruption” associated with transgender service members.
The announcement reversed the direction established under President Barack Obama.
In June 2016, Defense Secretary Ash Carter had announced that transgender service members could serve openly.
The Pentagon was also developing procedures that would eventually allow transgender people to enlist.
When James Mattis became Trump's defense secretary, he delayed implementation of the new accession policy until January 1, 2018, while the department continued studying the issue.
That review was still underway when Trump made his Twitter announcement.
What Happens to People Already Serving?
The immediate problem was obvious.
Transgender Americans were already serving in the military.
What happened to them?
Reporters asked White House Press Secretary Sarah Huckabee Sanders that question later the same day.
Would currently serving transgender troops be immediately discharged?
What about transgender personnel deployed to Afghanistan?
Would they be sent home?
Sanders could not provide a specific answer.
She said implementation would have to be worked out between the White House and the Department of Defense and carried out lawfully.
The Defense Department, she said, would likely take the lead.
That meant one of the most consequential questions raised by Trump's announcement—whether Americans already serving their country would lose their military careers—remained unanswered on the day the policy was announced.
The Pentagon Still Needed an Order
The unusual method of announcing the change became even clearer the following day.
The Pentagon indicated that Trump's tweets themselves had not changed existing military policy.
A formal directive was still required.
At the July 27 White House briefing, a reporter put the issue directly to Sanders: the Pentagon was saying that presidential statements on Twitter did not themselves change the military's policy.
Was Trump going to issue an actual directive?
Sanders responded that the tweets represented the announcement of the policy change and that the White House would work with the Defense Department to implement it legally.
The distinction was important.
The president had publicly declared a new policy.
But the military bureaucracy still needed formal instructions explaining what the policy actually required.
The Pentagon Appeared Caught Off Guard
Reporters also questioned whether the Defense Department had been prepared for Trump's announcement.
At the July 26 briefing, one reporter told Sanders that officials at the Pentagon appeared to have been caught “flat-footed” by the tweets.
The reporter noted that discussions had reportedly been underway concerning military health coverage for transition-related procedures, but Trump's announcement went substantially further by declaring that transgender people would not be permitted to serve at all.
Why, the reporter asked, had the normal procedural work between the White House and Pentagon apparently not been completed before such a major announcement?
Sanders defended the president's decision and said Trump had consulted with his national security team.
But the administration still could not provide the implementation details reporters were requesting.
The announcement had come first.
The formal policy process would follow.
Trump's Argument
Trump presented his decision as a matter of military effectiveness and cost.
The military, he argued, needed to focus on what he called “decisive and overwhelming victory” rather than bearing medical costs and disruption associated with transgender personnel.
The White House reinforced that explanation.
Sanders said Trump believed the previous policy was expensive and disruptive and raised concerns about military readiness and unit cohesion.
Those arguments became the administration's principal public justification for reversing the Obama-era policy.
Critics disputed both the reasoning and the necessity of removing transgender people from military service.
The announcement quickly drew opposition from civil-rights organizations, LGBT advocates, some lawmakers and military veterans.
Supporters of the change argued that the president, as commander in chief, had broad authority to establish personnel policies he believed necessary for military readiness.
The dispute was headed toward the courts.
A Campaign Promise Complicates the Story
The decision also attracted attention because of Trump's statements during the 2016 campaign.
In June 2016, following the mass shooting at the Pulse nightclub in Orlando, Trump had posted a message thanking the LGBT community and declaring:
“I will fight for you.”
Reporters confronted the White House with that statement after the military announcement.
Had Trump broken that commitment?
Sanders said no.
She argued that the military decision concerned readiness and cohesion rather than Trump's broader attitude toward LGBT Americans.
But the contrast ensured that Trump's earlier campaign statement would become part of the debate surrounding the new policy.
The Formal Order Comes a Month Later
Trump eventually put the policy into a formal presidential memorandum.
But not until August 25.
That document provided substantially more detail than the July tweets.
Trump directed the Defense Department and Department of Homeland Security, which oversees the Coast Guard, to return toward the military policy that had existed before the Obama administration allowed transgender people to serve openly.
The memorandum continued restrictions on transgender accessions and directed the government to stop funding certain sex-reassignment surgical procedures, subject to an exception for people who had already begun a course of treatment.
Significantly, the memorandum did not immediately order the discharge of every transgender person already serving.
Instead, Trump directed the defense secretary to determine how currently serving transgender personnel should be handled.
Until that determination was made, the memorandum stated that no action should be taken against those service members under the new policy.
The document also established future implementation dates rather than making the July 26 tweets immediately operative.
The formal memorandum therefore demonstrated just how many practical questions remained unresolved when Trump first announced the policy.
Then Came the Courts
The policy did not proceed without resistance.
Lawsuits followed.
Federal judges blocked significant portions of the administration's attempted restrictions, producing another extended legal battle over presidential authority and the rights of transgender service members.
The Pentagon eventually found itself navigating not only Trump's directives but court orders affecting their implementation.
The issue would continue evolving through the remainder of Trump's first term and into subsequent administrations.
But the political and legal battle began with those July tweets.
Military Policy by Twitter
Presidents routinely make consequential military decisions.
Normally those decisions move through an extensive process involving the Defense Department, military leadership, lawyers, personnel officials and written directives.
The July 26 announcement stood out because the public declaration arrived while crucial implementation questions remained unanswered.
Would currently serving troops be discharged?
The White House couldn't yet say.
Would deployed transgender troops be sent home?
The White House couldn't yet say.
When would the policy take effect?
That still had to be determined.
How would the Pentagon implement it?
That had to be worked out.
Trump had nevertheless announced the central decision to millions of people:
Transgender Americans, he said, would no longer be allowed to serve in the United States military “in any capacity.”
The formal orders would come later.
The implementation details would come later.
The lawsuits would come later.
On July 26, the commander in chief announced the change first—in three tweets.