Vice President Kamala Harris questioned whether former President Donald Trump is “fit” to serve as president after the Republican nominee canceled several planned interviews and spent more than 30 minutes at the end of a town hall in Pennsylvania standing on stage swaying to music rather than taking questions.

Donald Trump’s energy level emerged as a flashpoint as the Republican nominee and Democrat Kamala Harris scrambled across battleground Michigan on Friday

Kamala Harris slams Donald Trump after reports that he was exhausted on the campaign trail. Trump responded saying he is not tired and called Harris a “loser.” Democrat Chuck Rocha called Harris’ strategy a “masterclass” adding that “she knows just how to push his buttons.

Vice President Kamala Harris is questioning former President Donald Trump’s physical fitness and ability to serve as president. During a rally in Grand Rapids, Mich., Harris said Trump is “ducking debates and canceling interviews.

The vice president questioned whether her 78-year-old opponent had what it takes amid dwindling campaign schedule

Vice President Kamala Harris on Friday — again — questioned former President Trump's fitness to serve in the White House after his spate of campaign trail cancellations. Why it matters: Harris has devoted more of her once "joyful warrior" campaign to attacking her opponent,

Harris said to press before taking the stage at a campaign event in Michigan that Trump is out of touch with the hard work Americans do everyday.