Just before meeting Joe Biden, Leslie says she plans to be elected president in 2020. In real life, Biden was elected president in 2020.
Joe Biden admitted in a 2020 interview with WIRED that he does not consider himself to be an actor, but accepted the role on this show because he only would have to play himself.
When Leslie meets Joe Biden, she mentions taking over former Senator Hillary Clinton's job. Amy Poehler portrayed Hillary Clinton several times while being a cast member of Saturday Night Live (1975).
When Ben and Tom are meeting with Jessica Wicks at Sweetums, she mentions that they had a mishap: a molasses vat exploded, homes were flooded and people died. In Boston, MA, on 15 January 1919, a molasses tank at 529 Commercial Street exploded under pressure, killing 21 people. A 40-foot [12 m] wave of molasses buckled the elevated railroad tracks, crushed buildings and inundated the neighborhood.