KEILAR: A set back today for LGBT activists. The Supreme Court has ruled to allow Trump's ban on transgender military personnel to take effect for now. CNN Supreme Court reporter, Ariane De Vogue, is here to explain this ruling to us. What does this mean?</s>ARIANE DE VOGUE, CNN SUPREME COURT REPORTER: What it means is the Trump administration asked for the court to take up the appeal to this policy. The Supreme Court said, no, we're not going to do that today. We're going to allow this to play out in the lower courts. But what we will do is allow it to go into effect now while it's playing out below. So it was an interesting choice they made. And, of course, LGBT rights activists are very unhappy about the fact that they're going to allow it to go into effect.</s>KEILAR: So what does it mean, because there are military personnel who are transgender who are currently serving, I believe, thousands of them? How does this impact them?</s>DE VOGUE: By the military's own numbers, back in 2016, they said there's something like 8,000 people who identify as transgender individuals. That's the military's own numbers. But a very small percentage of that under the prior administration began to transition and they may be exempted. But LGBT rights activists say basically what this means is that people who want to serve in the sex that -- not the sex they were assigned at birth, they won't be able to. That's where things stand now. It's worth noting there still is an injunction in place in one lower court case but the administration is probably going to go as soon as today and bring it up to date with what happened at the Supreme Court. It's interesting. Courts going to stay out of the hearing the case but it's going to allow it to go into effect while it plays out in the lower courts.</s>KEILAR: All right. That means we have much more ahead of us for this case. Ariane, we know that you'll be following it. Ariane De Vogue. And that is it for me. NEWSROOM with Brooke Baldwin starts right now.
Supreme Court Allows Trump's Transgender Military Ban.