American leftists love to be lectured by foreigners, especially if they have what's considered to be a nice accent (Australian, Irish, certain British accents, etc.) Just off the top of my head, the non-American late night 'comedy' show hosts (that aren't on overtly political channels like CNN, Fox, MSNBC, etc.) in the past few years who do/did overtly lefty political stuff all of the time include:
- Samantha Bee (Canada)
- James Corden (UK)
- Jim Jeffries (Australia)
- Trevor Noah (South Africa)
- John Oliver (UK)
- Lilly Singh (Canada)
With the exception of Jeffries' show, and Singh's show which was just cancelled this year after bombing spectacularly, they match the number (I omit Fallon from the list as he doesn't really seem political) of actual American hosts (off the top of my head: Kimmel, Colbert, Meyers and Maher) who mostly do the same thing currently.