Section 508 of the Rehabilitation Act “require[s] federal agencies to ensure that EIT [electronic information technology] they procure is accessible to people with disabilities.” That includes websites.
Most notably, these White House pages don’t provide alternative text for all images. A blind person surfing the Internet uses a program that searches for text that identifies images. Many images on the White House site have no associated text in the web code and leave a person with disabilities unable to tell what the image is.
Contact Linda Sites and Linda Tolkan in the Executive Office of the President and ask why the White House site isn’t in compliance and what steps, if any, are being taken to fix the problem. (Check out American Progress’s letter to the EOP here.)