BOSTON (AP): Sen. Edward M. Kennedy, the lone surviving son in a famed political family who helped define national Democratic Party politics, suffered a seizure at his Cape Cod home on Saturday and was recovering in good spirits at a Boston hospital.

Kennedy, 76, did not suffer a stroke and ``is not in any immediate danger,'' said Dr. Larry Ronan, the Massachusetts senator's primary care physician.

``He's resting comfortably, and watching the Red Sox game with his family,'' Ronan said. ``Over the next couple of days, Senator Kennedy will undergo further evaluation to determine the cause of the seizure, and a course of treatment will be determined at that time.''

Kennedy's wife, Victoria, three of his children and his niece Caroline Kennedy were among those with him at the hospital.

On Saturday morning, Kennedy felt ill at his home and went to Cape Cod Hospital. After a discussion with his doctors in Boston, the senator was flown to Massachusetts General Hospital.

Senate Majority Leader Harry Reid said he spoke to Kennedy's wife in the afternoon and was told ``his condition is not life-threatening, but serious.''

``But the one thing I can say, if there ever was a fighter, anyone who stood for what we as Americans, we as Democrats, stand for, it's Ted Kennedy,'' Reid said addressing the Nevada Democratic Convention in Reno.

Kennedy, the second-longest serving member of the Senate, was elected in 1962, filling out the term won by his brother, John F. Kennedy.

Kennedy eldest brother, Joseph, was killed in a World War II airplane crash. President John Kennedy was assassinated in 1963 and his brother Robert was assassinated in 1968.

Kennedy is active for his age, maintaining an aggressive schedule on Capitol Hill and across Massachusetts.

He has been vocal in both his opposition to the Iraq war and support for Democratic presidential contender Barack Obama, who is trying to become the first senator elected to the White House since John F. Kennedy.