Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.Cory Booker and Pete Buttigieg round out the top tier of Democratic candidates, but neither one of them has released a climate plan yet. Booker’s placeholder is here; Buttigieg’s is here. Neither one looks very promising, but I’ll withhold judgment for now. When they release their plans, I’ll grade them then.