When News Corp. and CEO Rupert Murdoch secured enough shares to buy Dow Jones & Co. four years ago, these columns welcomed our new owner and promised to stand by the same standards and principles we always had. That promise is worth repeating now that politicians and our competitors are using the phone-hacking years ago at a British corner of News Corp. to assail the Journal, and perhaps injure press freedom in general.

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At least three British investigations into phone-hacking and payments to police and others by the now-shuttered News of the World tabloid are underway, with 10 arrests so far. News Corp. and its executives have apologized profusely and are cooperating with authorities. Phone-hacking is illegal, and it is up to British authorities to enforce their laws. If Scotland Yard failed to do so adequately when the hacking was first uncovered several years ago, then that is more troubling than the hacking itself.

The British politicians now bemoaning media influence over politics are also the same statesmen who have long coveted media support. The idea that the BBC and the Guardian newspaper aren't attempting to influence public affairs, and don't skew their coverage to do so, can't stand a day's scrutiny. The overnight turn toward righteous independence recalls an eternal truth: Never trust a politician.