Democratic Senator Mark Warner said he was "disappointed that Facebook didn't come forward with this information".
Memes, moaning, and animojis - here's how social media reacted to Apple's anniversary iPhone.
'Honestly this is the most relatable Ted Cruz has ever been,' one Twitter user wrote.
The European Parliament in Brussels will vote on the proposal to amend the law on 10 October.
Threaded drafts leak, but Twitter refuses to comment.
"There is a disconnect in her that is immeasurable," one Twitter user wrote.
Project involves 137 AI programs developed through partnerships with private firms.
'He says the strangest things at the worst times,' one Twitter user wrote.
"I really loved Federal G's first album but thought his more recent one was a little meh," one person tweeted.
Arkansas pair charged on nine counts over steamy public sex sessions.
"Sanitize my entire brain," one Twitter user wrote.
'Wrong again, Donald,' British author Emma Kennedy tweeted.
The social media site said the ads were consistent with what they referred to as 'information operations'.
Uzi Nissan owns a computer company, and a website which shares a name with the Japanese car maker.
Hell have no fury like 'Helen' scorned as Twitter falls for teen's practical joke.
"This will break Donald's heart," one Twitter user wrote.
"Liar just like daddy," one Twitter user wrote.
Instagram and Facebook are reportedly attempting to force the hackers' website offline by registering hundreds of Doxagram domains.
"It seems this tweet doesn't really apply to the Trump family," one Twitter user wrote.
"Your impeachment can't come soon enough, for the sake of the entire planet," one Twitter user said.
Users are paying thousands for the sacred blue tick of authenticity.
"I may never heel from this covfefe predisency," Jimmy Kimmel Live writer Bess Kalb tweeted.
"Does this mean Putin has picked a new US president?" one Twitter user asked.
A Dutch man held on suspicion of inciting a possible terror crime says he's just an amateur sleuth.
Owner of armoured clothing line fires gun at wife's stomach in extreme marketing stunt.
"She's a complete and total fake," one Twitter user wrote.
"Dreamers are more American than the President of the United States," one Twitter user wrote.
Mark Zuckerberg's Facebook rebuked by UN and International Organisation for Migration over migrants' torture.
'It's like you're condemning me to death,' one Twitter user said.
'Tweets containing threats are not allowed under our terms of service,' Twitter's notice read.