As President Trump questions climate change, the GOP joins his skepticism. But incoming Sen. Mitt Romney is one of few saying climate change is real, and humans are a factor.

(Rick Egan | The Salt Lake Tribune) Mitt Romney gives his victory speech, at the Romney Headquarters, in Orem, on election night, Tuesday, Nov. 6, 2018. President Donald Trump has become an outspoken voice against climate change, and many in his party have fallen in line behind him. But Romney has said he believes climate change is real, and that human activity is a factor.