Lawmakers Push to Rein In Tech Firms After Google+ Disclosure

Exposure of users’ private information on social-media service prompts calls from both parties for action

WASHINGTON—Top lawmakers of both parties argued Wednesday that Congress needs to take action to rein in big tech companies, citing revelations about Google+ as the latest example of questionable practices involving consumers’ private information.

The Wall Street Journal reported earlier this week that Google exposed the private data of hundreds of thousands of users of its Google+ social network. The company, a unit of Alphabet Inc., chose not disclose the issue earlier this year, in part because of worries that news of the...