The transgender reality star reacted online after the Trump administration withdrew Obama-era guidance on transgender bathroom use in public schools.
Jenner called the move 'a disaster.'
"I have a message for President Trump from well, one Republican to another. This is a disaster."
Jenner also addressed transgender kids and bullies in her video with this message:
"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. 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," she said. "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."
Jenner became perhaps the most high-profile face of the transgender community after she came out on the cover of Vanity Fair magazine in 2015. She documented her life after transition in two season of "I am Cait.