When Donald Trump’s tweets are fake, we’re going to have to rethink our understanding of the news

Now Playing: Trump’s fake tweets may be fake, but he’s not fooling anyone anymore Now Playing.

Now Playing Trump says the election will be rigged Now Playing ‘This man is not a genius’ – The Hill’s Josh Dawsey Now Playing Here’s what you need to know about the Kavanaugh confirmation process Now Playing What you need the next four years to know About The Supreme CourtNow Playing ‘We are in the middle of a massive transformation’: Ivanka Trump says she’s not worried about Trump Now Playing Watch: Former President Barack Obama talks about his legacy with the UN General AssemblyNow Playing Former Secretary of State Hillary Clinton says the FBI ‘cannot be trusted’ Now Playing Who will be running the U.S. in 2020?

Now Playing Former US President Bill Clinton talks about 2020 Now Playing How the new Trump administration is changing the face of U.N. diplomacyNow Playing U.K. Prime Minister Boris Johnson has said he wants Britain to stay in the European UnionNow Playing Trump: If Hillary Clinton wins the White House, ‘we are going to go back to where we were before’Now Playing Donald Trump Jr. on Russia: ‘We have to take a hard look at what is happening’Now Play Trump: We should not be doing anything that would hurt our own country Now Playing Uphill battle over Kavanaugh as Supreme Court nominee faces tough questionsNow Playing Senate Judiciary Committee to take up Kavanaugh nomination on ThursdayNow Playing President Trump to address Congress about Kavanaugh nomination Now Playing Donald Trumps lawyers defend his eldest son’s nomination to be Supreme Court justiceNow Playing How to get your vote on KavanaughNow Playing White House press secretary to testify before Senate Judiciary panelNow Playing Why the Senate is weighing Kavanaugh nominationNow Playing The Supreme Council of Canada’s ‘blacklist’ of ‘terrorists’ now a realityNow Playing Who is behind the ‘blacklists’?

Now It’s the first time in history that a foreign power has publicly denounced a US citizenNow Playing Meet the new administration’s White House Press SecretaryNow Playing Sen. Elizabeth Warren on Kavanaugh’s nominationNow The U.P.A. to sue Exxon over pollutionNow Playing What we learned from the Russia investigation