USA TODAY NETWORK

Scott Pruitt, President-elect Donald Trump's nominee to head the Environmental Protection Agency, testified before the Senate Environment and Public Works Committee for his confirmation hearing Wednesday. The committee is sharply divided along party lines, and the hearing is expected to be especially contentious as Democrats challenge the Oklahoma attorney general's ties to polluting industries, his skepticism about climate change and the frequent lawsuits he has filed to block the EPA's clean air and water rules. Watch the hearing in the player above.