Former President Jimmy Carter is doing fine after being rushed to the hospital during his book tour.

The 85-year-old former president became sick to his stomach Tuesday while on a flight from Atlanta to Cleveland.

After landing, a medical team took Carter to Metro Health Medical Center.

He is now under observation and resting comfortably.

"He's definitely resting comfortably and expected to continue his book tour this week," grandson Jason Carter said. "I haven't talked to

him, but nobody in the family is concerned."

In his book, "White House Diary," Carter said he pursued an overly aggressive agenda as President.

He was elected to the White House in 1976, and he said he lost re-election in 1980 because of the Iran hostage crisis and the Democratic primary challenge by U.S. Sen. Ted Kennedy.