President Trump has done one thing about illegal immigration before a single section of wall has been constructed. He’s significantly reduced illegal border crossings by 40 percent.

The number of illegal immigrants crossing into the United States from Mexico declined by 40 percent from January to February, the Department of Homeland Security Secretary said late Wednesday.
The downturn came after President Donald Trump took office on Jan. 20 vowing to deport many of the estimated 11 million illegals in the United States.
The flow of illegal border crossings – measured by apprehensions and the prevention of ‘inadmissible persons’ apprehended at the southern border by U.S. Customs and Border Protection – dropped to 18,762 in February from 31,578 in January, DHS Secretary John Kelly said in a statement.
He said CBP, which compiled the data, historically sees a 10 percent to 20 percent increase in apprehensions of illegal immigrants from January to February.

Source: Illegal border crossings drop 40 PER CENT in February | Daily Mail Online