Federal Election Commission

Facebook may be facing an 'era of accountability'

The problems keep piling up for Facebook, and it's unclear how long the internet giant will be able to brush them aside as it barrels toward acquiring its next billion users.

The world's biggest social network has unwittingly allowed groups backed by the Russian government to target users with ads. That's after it took months to acknowledge its outsized role in influencing the U.S. election by allowing the spread of fake news — though before news emerged that it let advertisers target messages to "Jew-haters."

Now Facebook is under siege, facing questions from lawmakers and others seeking to rein in its enormous power. The company has turned over information on the...

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