All that the President did was allow for E15 to be sold throughout the summer, just as it was all winter. If your station offers E15, it still will. If you don’t want it, get the stuff you always did. This isn’t a requirement for gas stations to carry E15, just a relaxation of the rule that it can only be sold in the colder months.
To be clear, I am not a fan of ethanol in fuel but want to clear up possible confusion. I definitely stay clear of the ethanol in a boat when possible.