In a tweet, he said: "The way President Obama runs down the stairs of Air Force 1, hopping & bobbing all the way, is so inelegant and unpresidential. Do not fall!"
Donald Trump jabs Obama walk: 'So inelegant and so unpresidential' →
Still," he noted.
Inside the Beltway: White House Correspondents' Dinner equalizer for journalists, politicians, celeb →