John Glenn

US Congress

Former astronaut and U.S. Senator John Glenn is in the hospital and undergoing treatment. No details are being given about his condition or possible illness.

For decades now, Democratic candidates running in Ohio - from president to mayor - have turned to one man for help, the one man who is probably the most popular Democrat in the Buckeye State - former senator and astronaut John Glenn.

For decades now, Democrats running in Ohio - from president to governor to a host of lesser offices - have turned to one man to help give their campaigns a boost - John H. Glenn Jr., the Mercury astronaut who was the first American to orbit the earth.

Glenn, now 90 years old, left the U.S. Senate in 1999 after representing Ohio in the U.S. Senate for 24 years; and he remains one of the most popular figures in Ohio politics - not only for his service in the Senate but for his status as an icon of the U.S. space program.