On Thursday, Caitlyn Jenner joined the chorus of celebrities speaking out against Donald Trump's decision to rescind Obama-era protections for transgender students.

"I have a message for President Trump from, well, one Republican to another. This is a disaster," the reality star said in a video on Twitter. "And you can still fix it. You made a promise to protect the LGBTQ community. Call me."

Jenner had been silent about the decision by the White House to undo President Obama's directive telling public schools to allow transgender students to use bathrooms and other facilities consistent with their gender identity.

Other celebrities have already spoken out on social media, including Katy Perry, Chris Evans, Mark Hamill, Laverne Cox and Ellen DeGeneres, who tweeted "For anyone who feels scared or hopeless, know that we will never stop fighting for your rights."

Jenner, a Republican, had supported Trump in the election, stating she would be good on LGBT issues.

"He seems very much behind the LGBT community because of what happened in North Carolina with the bathroom issue," she said. She was seen at an inauguration gala with House Speaker Paul Ryan and Fox Business's Maria Bartiromo.

In her video, she also reached out to trans kids who may be feeling hopeless.

"I have a message for the trans kids of America. You're winning. I know it doesn't feel like it today or every day, but you're winning," she said. "Very soon we will win full freedom nationwide and it's going to be with bipartisan support. You can help by checking out the National Center for Transgender Equality and letting Washington hear you loud and clear."

And she had a word for transphobes, too.

"Now I have a message for the bullies: You're sick. And because you're weak, you pick on kids, you pick on women or anyone else you think is vulnerable. Apparently even becoming the attorney general isn't enough to cure some people of their insecurities."

The last line is apparently a dig at AG Jeff Sessions, whose Justice department is overseeing the reversal of President Obama's order. How Jenner can divest Sessions from Trump, the man who hired him and gives him his marching papers, is pretty astounding.