The U.S. Senate voted Thursday to confirm former North Dakota Gov. Doug Burgum to lead the Department of Interior. During his confirmation hearing, Burgum emphasized a commitment to advancing U.S. energy production in President Donald Trump’s administration.

Emails obtained by the Associated Press reveal Doug Burgum as North Dakota governor aided oil and gas executives and leveraged connections to boost his profile.

President Donald Trump tapped Burgum, a billionaire software industry entrepreneur, to spearhead the administration’s ambitions to boost fossil fuel production.