(CNN)Apprehensions at the southern border continue to fall dramatically, according to new numbers from Customs and Border Protection -- a drop that experts attribute to President Donald Trump's aggressive immigration enforcement policies.
There were roughly 12,000 total apprehensions at the southwest border in March, according to numbers obtained by CNN that are expected to be released this week. That represents a 35% drop from February and a 63% drop from March 2016.
In 17 years of CBP data, apprehensions had never dropped from February to March, typically rising slightly.