evidence: Donald Trump campaigned for the presidency in 2016 with a pledge to bring down illegal immigration, famously blaming undocumented migrants from Mexico for a host of problems, including drugs and crime. In the four years since, how has this rhetoric translated into a wider immigration policy? [...] Mr Trump has allowed more people to come to the US temporarily for work, but made it harder for people to settle permanently in the US. The reduction in permanent visas, from about 1.2 million in 2016 to about 1 million in 2019, has primarily affected family members of US citizens and residents hoping to join their relatives, with the number of permanent visas sponsored by employers largely unchanged. [...] One interesting question is whether President Trump's tough stance on immigration is still a major selling point among his supporters. The number of people telling pollsters that immigration is a bad thing has fallen steadily since he took office, with many former detractors apparently now believing it is generally good for the US.