From Muppet Wiki

Ronald Reagan (1911-2004) was an actor, politican, and the 40th President of the United States of America. His film career included key roles in Dark Victory and This Is the Army.

Stock footage of Reagan, from his movie days, appeared in the Muppet Babies episode "The Transcontinental Whoo-Whoo," intercut during the babies' funny face contest.

In the fourth season Farscape episode "Kansas," John Crichton arrives back on Earth in 1985, and hears an audio transmission, which quotes President Reagan's concerns over the situation in Nicaragua.