Since its start, the Trump administration has implemented policies to step up immigration enforcement and reduce the number of immigrants admitted into the U.S.

Many of these efforts - like the border wall, the travel ban, family separations, DACA termination and detention centers - have received wide media attention. In addition, the White House slashed refugee admissions, ended a number of special programs and changed rules used to adjudicate visa applications.

As a result of these and myriad lesser-known administrative changes, legally immigrating to the U.S. has become a lot harder, as evidenced by the sharp increase in the number of visa denials in 2018. President Donald Trump heads the most immigration-restrictive administration since the 1920s.

Yet decades of public opinion polls show that Americans have never felt warmer toward immigrants, nor have they ever been more supportive of immigration.