A spokeswoman for Sen. Cory Booker (D-N.J.), another possible candidate, referred to Booker’s interview with Vox in April. He said then that “I believe, ultimately, in ideas like single payer or Medicare for all,” while adding that “I don’t know how we get it done in this environment.” 

Sanders single-payer bill poses dilemma for 2020 Dem hopefuls | TheHill

Exactly, Cory. Exactly.