Only 109 people out of 325,000 were detained and held for questioning. Big problems at airports were caused by Delta computer outage,…..
— Donald J. Trump (@realDonaldTrump) January 30, 2017
Truth: “A senior Department of Homeland Security official said Saturday that in the first 23 hours the order was in effect, 375 people had been detained on arrival in the U.S., prevented from boarding flights at their point of departure or intercepted while en route to the U.S.” These figures do not take into account any actions taken on Sunday against travelers. It also is not related to the Delta computer issue to which Trump referred.
“Donald Trump’s Immigration Order Sparks Confusion, Despair at Airports” – Wall Street Journal (paywall) 1/29/2017
UPDATE: The US Department of Justice has since indicated that tens of thousands of visas were revoked.