At a Florida rally on February 18, 2017, Donald Trump spoke about threats of terror:
We’ve got to keep our country safe. You look at what’s happening in Germany, you look at what’s happening last night in Sweden. Sweden, who would believe this? Sweden. They took in large numbers. They’re having problems like they never thought possible. You look at what’s happening in Brussels. You look at what’s happening all over the world. Take a look at Nice. Take a look at Paris. We’ve allowed thousands and thousands of people into our country and there was no way to vet those people. There was no documentation. There was no nothing. So we’re going to keep our country safe. (NY Times)
Trump’s words suggested that something terrible had happened the night before in Sweden. Something like the terrorist attacks in Brussels and Paris. Something caused by undocumented refugees. But there had been no terrorist activity in Sweden the night before (Independent). The only recent Swedish terror attack had been over a month ago: Neo-Nazi members of the Nordic Resistance Movement attacked an immigrant asylum in Gothenburg and injured one person.