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Keystone XL Pipeline

Trump's energy backslide

Trump's energy backslide

If the energy plan unveiled by Donald J. Trump this week sounds a lot like right-wing talk radio — long on meaningless catch phrases and short on actual knowledge — we're guessing that's no coincidence. The billionaire New York developer with the undisclosed tax returns who is definitely-yet-still-inexplicably the presumptive presidential nominee of the Republican Party is these days flexing his conservative bona fides on an issue that he probably cares hardly a whit about (unless it involves one of his own properties, of course).

Here's Mr. Trump's plan in a 55-gallon drum: He loves petroleum and natural gas and wants the country to produce as much of those fossil fuels as...