Robbie Orvis, senior director for modeling at the think tank Energy Innovation, said he expects energy affordability to be the major issue of the year. He pointed to the rising wholesale price of natural gas and how that is likely to translate into higher utility bills, since gas is the country’s leading fuel for power plants and home heating.

In an executive order, Trump put an end to more than three decades of U.S. support for the United Nations Framework Convention on Climate Change, the world's long-standing climate treaty.