Just got this email from the Obama campaign about Obama's scheduled campaign stop in Des Moines on Thursday…

Senator Barack Obama’s visit to Iowa on Thursday has been cancelled. Please see the below statement from Senior Adviser Robert Gibbs.

“Senator Obama's grandmother, Madelyn Dunham, has always been one of the most important people in his life. Along with his mother and his grandfather, she raised him in Hawaii from the time he was born until the moment he left for college. As he said at the Democratic Convention, she poured everything she had into him.

“Recently, his Grandmother has become ill, and in the last few weeks, her health has deteriorated to the point where her situation is very serious. It is for that reason that Senator Obama has decided to change his schedule on Thursday and Friday so that he can see her and spend some time with her. He will be returning the the campaign trail on Saturday.”