Calling out Kerry, doubting climate change: Cruz said that the data on global warming doesn't support environmental activists' argument.
"You always have to be worried about something that is considered a so-called 'scientific theory' that fits every scenario. Climate change, as they've defined it, can never be disproved," he said.
He called Secretary of State John Kerry's remarks that climate change is a national security threat "ironic" considering the other major crises rocking the world.
Kerry's recent comments that climate change ranks among the world's most serious problems has sparked outrage, particularly from Republicans.
"He sees a greater threat from your SUV than he does to Iranian nuclear weapons," Cruz said.