President Joe Biden, 80, the oldest serving president in U.S. history, has reportedly been using a smaller set of stairs to board Air Force One in an attempt to limit any missteps.

Biden has had a number of stumbles on the more traditional longer set of stairs leading to a doorway near the front of the main passenger level, high above the tarmac. Politico reported Wednesday that a few months ago, Biden began boarding by using a shorter set of retractable stairs that fold into the belly of the plane.

Two Biden advisers told Politico that the change was intentional to make Biden's travel easier and limit the possibility for missteps. The longer stairway has 26 steps, but the shorter one has 14. Biden was also seen walking in sneakers instead of dress shoes, another concession to comfort necessitated by age, Politico reported.

The focus on Biden's age is among a number of negative factors affecting his prospects for reelection.... Read More: Newsmax