Sessions said it was clear to him that "good people don't smoke marijuana."

Presidents that have smoked/grow pot:
Prez #1 -- Washington(Grew and smoked)
Prez #3 -- Thomas Jefferson (Grew and smoked)
Prez #4 – James Madison (Grew and smoked)
Prez #5 – James Monroe (smoked hashish with French ambassador and never stopped until death)
Prez #7 – Andrew Jackson(smoked with his troops wrote about it in letters)
Prez #12 – Zachary Taylor(smoked with his troops wrote about it in letters)
Prez #14 – Franklin Pierce(smoked with his troops wrote about it in letters)
Prez #35 – John F. Kennedy
Prez #37 – Richard Nixon
Prez #40 – Ronald Reagan(only once and didn't like it)
Prez #42 – Bill Clinton
Prez #43 – George W. Bush
Prez #44 – Barack Obama

I will just leave this list here with a question. 

Why does Jeff Session, mr. recuse from russia investigations,  think our founders were not good people?