Not saying the post came from the White House, but the photo was taken from the White House - based on the angle of the image, with the Fountain, and the Washington Monument off at an angle, and the Jefferson Memorial being in the background of the image.

Also - using various reverse image search tools, this picture doesn't appear to be anywhere else on the Internet. That doesn't mean the photo was taken today - just that it's first appearance on the Internet appears to be today (increasing the likelihood that it wasn't grabbed from somewhere else, and used to LARP).