Head of Twitter's 'site integrity' in charge of fact-checking Trump has previously tweeted the administration are Nazis, compared Kellyanne Conway to Joseph Goebbels and said fly over states are racist

The head of Twitter's fact-checking team has previously tweeted that the Trump administration are Nazis, compared adviser Kellyanne Conway to Joseph Goebbels and said fly over states are racist.

Yoel Roth, whose official title at Twitter is head of Site Integrity, faced backlash on Wednesday after his history of anti-Trump tweets emerged less than 24 hours after the social media giant put a fact-checking warning on two of the president's tweets. 

Twitter prompted readers to check the facts in Trump's tweets after the president on Tuesday suggested that California's mail-in balloting initiative would lead to substantial voter fraud in the November general election. 

The social media giant said Trump's claims about mail-in ballots being 'substantially fraudulent' were found to unsubstantiated by fact-checkers at CNN, the Washington Post and other media outlets.