On âSNL,â Jim Carrey Steps Aside for Alex Moffat, the New âJoe Bidenâ The comedy starâs high-energy impression of the president-elect polarized viewers. But other impersonators say getting Biden right is tougher than it looks. Jim Carrey as Joe Biden in October. Kyle Dubiel/NBC By Dec. 20, 2020 12:18 am ET Whatâs funny about Joe Biden? Comedians have been trying to crack that question with mixed results in their impersonations of the president-elect, including Jim Carrey on âSaturday Night Live.â The âDumb and Dumberâ superstar embodied Mr. Biden with lanky energy and a toothy rictus during the last stretch of the election. But his impression divided the nationâor at least the population with strong opinions about political satire and late-night sketch comedy.