The day before Halloween, U.S. President Donald Trump landed at Joint Base Andrews after spending nearly a week in Japan and South Korea. He was then whisked to the White House, where he passed out candy to trick-or-treaters. Allies crowed over the president¡¯s stamina: ¡°This man has been nonstop for DAYS!¡± one wrote online.

A week later, Trump appeared to doze off during an event in the Oval Office.

With headline-grabbing posts on social media, combative interactions with reporters and speeches full of partisan red meat, Trump can project round-the-clock energy, virility and physical stamina. Now at the end of his eighth decade, Trump and the people around him still talk about him as if he is the Energizer Bunny of presidential politics.