“It is a complete difference from what he was in 2017,” Mike McCormick, who worked as a White House stenographer for 15 years and with Biden from 2011 to 2017, told the Washington Free Beacon in an interview. “He’s lost a step and he doesn’t seem to have the same mental acuity as he did four years ago.”

“He doesn’t have the energy, he doesn’t have the pace of his speaking,” McCormick said. “He’s a different guy.”

McCormick’s recent book Joe Biden Unauthorized recounts his time working with Biden and takes a critical look at the former vice president, including the time he says Biden was “humiliated”  by Russia’s Vladimir Putin in 2011.

McCormick—who often traveled with Biden and transcribed his speeches, public conversations with foreign leaders, and off-the-record media briefings for the official White House record—said the vice president had a talent for connecting with audiences when he was in office and almost always veered off script from his pre-written speeches. Biden’s physical stamina and cognitive health have come under scrutiny during the 2020 election, due to a series of speaking appearances in which the 77-year-old has appeared to lose his train of thought, struggled to finish a sentence, or forgotten where he is.

McCormick said that Biden used to shoot from the hip but noted he is not the same guy citing how Biden read the whole DNC acceptance speech verbatim.