The US Energy Information Administration (EIA) has issued a report projecting natural gas to be the largest source of US electricity generation this Summer, exceeding coal. From the agency site:

EIA’s April 2017 Short-Term Energy Outlook (STEO) expects that electricity generation fueled by natural gas this summer (June, July, and August) will be lower than last summer, but it will continue to exceed that of any other fuel, including coal-fired generation, for the third summer in a row. The projected share of total U.S. generation for natural gas is expected to average 34%, which is down from 37% last summer but still exceeds coal’s generation share of 32%.

You can access the report here: https://www.eia.gov/todayinenergy/detail.php?id=30832#