• The researchers also “ had trouble working to get the database closed.”

• “A Facebook spokesperson said that the company’s policies prohibit storing Facebook information in a public database. Once it was alerted to the issue, Facebook worked with Amazon to take down the databases.”

It has been over a year since the Cambridge Analytica scandal showed how widely Facebook had shared user data with third-party app developers. The social network began to audit that data-sharing last year, but the research report shows the struggle the company still faces.

More: Facebook is paying the British newspaper The Telegraph to publish sponsored articles that play down concerns about its practices. New research suggests that its algorithms target ads by race and gender even when advertisers request a broad audience. And have Mark Zuckerberg’s tech regulation proposals been treated unfairly?

Trump joins the trade talks

President Trump is expected to meet China’s trade envoy, Liu He, in Washington later today. That could be a sign of progress on some of the sticking points surrounding a potential deal, according to Bob Davis of the WSJ.

The U.S. and China have been at odds over tariffs imposed on $250 billion of Chinese goods. Washington sees them as a way to ensure that China sticks to the deal; Beijing wants them removed as soon as it’s signed. China has few other hard demands, and U.S. businesses have urged the Trump administration to remove the tariffs.

There could be workarounds. The U.S. trade representative, Robert Lighthizer, has “been using the tariff issue to push for another U.S. priority — that China agree to a no-retaliation clause in a trade deal,” Mr. Davis reports. The plan, which could let the U.S. unilaterally impose levies on Chinese goods if China does not comply, could “help him persuade Mr. Trump to approve the agreement and lift a substantial amount of tariffs.”

“Mr. Trump is looking to announce on Thursday the date of a summit with Mr. Xi,” an unnamed Trump administration official told Mr. Davis. “That’s a big signal the two sides are on the cusp of a deal, trade experts say, and a resolution of the tariff issue.”