Bloomberg L.P.

Trump says something sensible on transportation funding, then recants

President Donald Trump says a lot of things, sometimes contradictory, often ill-considered. We would list examples, but why bother? Even his most ardent supporters know it's true (and seem to love him for it). But every once in a while, Mr. Trump stumbles upon something quite worthwhile — as happened Monday when he told a Bloomberg News reporter that he would "certainly consider" raising the federal gas tax to pay for infrastructure improvements if the money was earmarked for highways.

Naturally, people around him quickly tried to put the kibosh on that statement. Press Secretary Sean Spicer told reporters that the president hadn't actually committed to supporting an...