4 pm, he'll meet with Hillary.
4:50 pm, he'll meet with Representatives Steny Hoyer, Jim Langevin and Jim Sensenbrenner. They are all involved in the Americans with Disabilities Act.
6 pm, Obama speaks at an event commemorating the Americans with Disabilities Act's 20th anniversary.
Just added this morning: Obama will speak at 2:20 pm eastern on campaign financing.