With Trump's EPA waiver on E15 summer sales, supporters say nation needs year-round access to gasoline with 15% ethanol to help cut pump prices.

The Environmental Protection Agency says consumers across the U.S. will still be able to buy cheaper E15 gasoline this summer.

The U.S. Environmental Protection Agency granted an emergency waiver permitting the nationwide sale of a fuel blend with higher amounts of ethanol through the summer months, which Iowa fuel and farm leaders say will help farmers,