Republicans' Climate Policy, Then and Now

People hold up signs during a news conference in support of the EPA's clean power plan, Monday, Aug. 3, 2015, in Las Vegas.

Christine Todd Whitman, former New Jersey governor and EPA administrator, co-chair of CASEnergy Coalition, a nuclear power advocacy group, and president of Whitman Strategy Group, talks about where Donald Trump's EPA leadership will differ from that of past Republican administrations.