Breaking news from Egypt: President Hosni Mubarak is expected to address his nation tonight (local time), and the leader of his political party says Mubarak may step down. The story is developing and there are conflicting reports about what Mubarak may or may not say. We will pass along information from major news outlets and NPR staff in Cairo.
(10:45 a.m. ET: The story is moving quickly, so we're switching to a live-blog approach. Our updates will flow into the box below automatically. If you look below the box, you can read our original post and two earlier updates.)