See Candidate Page Tom Steyer, Climate Climate tweets on Steyer 11/20/19 Activist Tom Steyer: "I'm the only person on this stage who will say that climate is the No. 1 priority for me." Steyer says he would declare a state of emergency to battle climate change. #DemDebate pic.twitter.com/MICBhojTOd— CNBC (@CNBC) November 21, 2019