WASHINGTON, DC - OCTOBER 23: (AFP OUT) U.S. President Donald Trump listens to a question as he speaks to the press pool after signing S.3021, America's Water Infrastructure Act of 2018, in the Oval Office of the White House on October 23, 2018 in Washington, DC. The President took questions from the pool on the caravan and Saudi Arabia. (Photo by Ron Sachs - Pool/Getty Images)
Trump's history of promoting false theories (2018)
The Lead
CNN's Jake Tapper explores President Donald Trump's history of promoting conspiracy theories and how social media helps to spread them.
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WASHINGTON, DC - OCTOBER 23: (AFP OUT) U.S. President Donald Trump listens to a question as he speaks to the press pool after signing S.3021, America's Water Infrastructure Act of 2018, in the Oval Office of the White House on October 23, 2018 in Washington, DC. The President took questions from the pool on the caravan and Saudi Arabia. (Photo by Ron Sachs - Pool/Getty Images)
Trump's history of promoting false theories (2018)
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