Six things to know before Trump gives his border wall address

1. Terrorists rarely enter the US through Mexico

In September, a state department report concerning 2017 found “no credible evidence indicating that international terrorist groups have established bases in Mexico, worked with Mexican drug cartels, or sent operatives via Mexico into the United States. The US southern border remains vulnerable to potential terrorist transit, although terrorist groups likely seek other means of trying to enter the United States.”

A report released by the justice department in January 2018 linked immigrants to terrorism. But security analysts immediately said the report was misleading and this month the department acknowledged the report was rife with errors and deficiencies. It has, however, refused to retract or correct it.

Last week, the White House press secretary, Sarah Sanders, declared that 4,000 known or suspected terrorists had been apprehended at the southern border. Government officials soon appeared to walk back the claim.

https://www.theguardian.com/us-news/2019/jan/08/trump-fact-check-speech-immigration-border-security