Author: DONIE O'SULLIVAN, CNN

DNC raises concerns about Facebook's ability to catch trolls

The Democratic National Committee wrote to Facebook COO Sheryl Sandberg before Thanksgiving to raise concerns about the company's ability to catch online trolls and to change its political ad policy, according to a copy of the letter obtained by CNN.

Pressure mounts on Facebook amid political ad controversy

Facebook executives are facing mounting pressure, including from inside the company, to make sweeping changes to how the social media site runs political ads -- including reversing a controversial policy that allows politicians to run false ads and how voters are targeted on the platform.

False ad on Republicans tests Facebook's policy on lies

A left-leaning PAC ran a Facebook ad falsely claiming that Republican Sen. Lindsey Graham endorsed the Green New Deal. The ad came after Rep. Alexandria Ocasio-Cortez grilled Facebook CEO Mark Zuckerberg earlier this week about the company's policy of allowing politicians to run ads on the platform that are false.

Twitter tells Kamala Harris Trump stays

Twitter told Sen. Kamala Harris that it would not suspend President Donald Trump's account despite her urging the company to do so, according to a copy of a letter the company sent to the Harris presidential campaign.

Twitter suspends account hours after Trump retweeted it

In a move that will likely embolden President Donald Trump's claims that social media companies are biased against him and his supporters, Twitter suspended an account Tuesday evening that the President had retweeted just hours earlier.