Photo Illustration by Erin O'Flynn/The Daily Beast/Getty ImagesListen to this full episode of The New Abnormal on Apple Podcasts, Spotify, Amazon and Stitcher.After confusing Nikki Haley with Nancy Pelosi, and Barack Obama with Joe Biden on two separate occasions last month, former U.S. President Donald Trump apparently tried to put any questions about his cognitive abilities to rest last Saturday.Speaking at a rally in Las Vegas, the 77-year-old claimed to have aced a cognitive test given to hi