Two of President Donald Trump's wealthiest supporters, Robert Mercer and his daughter, Rebekah, attended a conference for the Heartland Institute where speakers reportedly dismissed climate change and the science to support it.

Myron Ebell, a former member of Trump's transition team on the environment, thanked "the people in this room and people like you around the country," during a session called "Resetting Climate Policy," which the Mercers attended, The Washington Post reported.

Ebell received the "Speaks Truth to Power Award" from Heartland for his opposition to the idea of man-made climate change.

"It's the people who have worked persistently against global warming alarmism that made this election result possible," he said.

The Mercer family's foundation gave the Heartland Institute over $5 million from 2008-2015, according to the Post, though the size of the donations has dropped in recent years. In 2014 and 15, the Mercer foundation gave $500,000 to Berkeley Earth, which is run by former global warming skeptic who changes his views in 2012.

According to Muller, Mercer "has been very supportive of our work and never once did he indicate to us that he had a hope for outcomes in what we did."

Rebekah Mercer declined to speak with a Post reporter at the event.