The media have reached a turning point in covering Donald Trump. He may not survive it.

It happened because the Post’s David Fahrenthold and some other reporters did what journalists are supposed to do. They raised questions about Trump’s fundraiser, and when they didn’t get adequate answers, they investigated, gathered facts, and asked more questions.

It was excellent work — time-consuming, difficult, and ultimately paying dividends in public understanding. And Trump’s attack on them for doing their jobs the way those jobs are supposed to be done couldn’t have been better designed to get every other journalist to want to do the same. They’re no different than anyone else: When you make a direct attack on their professionalism, they’re likely to react by reaching back to their profession’s core values to demonstrate that they can live up to them. Trump may have wanted to intimidate them, but it’s likely to have the opposite effect.

Wow, journalism. It gets stuff done.