District Court in Washington on behalf of five transgender service members with nearly 60 years of combined military service.
Transgender people have been allowed to service openly in the military since June 2016. Trump, in a series of tweets on July 26, announced that he planned to end that policy.
The government "will not accept or allow transgender individuals to serve in any capacity in the U.S. military," he tweeted, contending that their service entailed "tremendous medical costs and disruption."
The lawsuit, filed by GLBTQ Legal Advocates & Defenders (GLAD) and the National Center for Lesbian Rights, says such a ban is unconstitutional, denying transgender service members equal protection and due process.
Dozens hold "Resist" signs near a Times Square military recruitment center to show their anger at Trump's decision to reinstate a ban on transgender individuals from serving in the military on July 26, 2017, in New York. Spencer Platt / Getty Images file
Lawyers handling the lawsuit said they hoped the court would move swiftly to prevent a ban from taking effect, given the uncertainty that transgender service members now face in regard to their livelihoods and retirement benefits.Read more at CBS News