Usually, his visits are announced at least a day early. Other legislators announce that way. For example Dan Newhouse sends out notifications as far as 36 hours in advance.
Oregon Senator Ron Wyden, (D) toured the Hanford Tank Farm area, trying to get answers and information about recent news of leaks from tank AY-102 and possible leakage from tank AY-101. They're two of the oldest double-shell tanks holding toxic waste at the site.
After speculation he might not come, officials have confirmed President Obama will be visiting Roseburg, OR - the home of Umpqua Community College. He will apparently meet privately with some of the families of the shooting victims. But others are not wanting any part of it, including some victim's families.
Because he is in town to attend a fundraiser, the President is going to potentially affect several hundred thousand drivers and commuters Thursday and Friday.