Trump claims there's a crisis at the US-Mexico border. What's the reality?

Trump has made several claims -- from saying that illegal border crossings have increased in the last decade to his claims on heroin "flooding" in from the border

President Trump has frequently called the situation at the southern border with Mexico a crisis and insists that building his long-promised border wall will fix it. Here are some of Mr. Trump’s most common assertions of a crisis, and the reality of what we know about immigrants and the border.

TRUMP -- “We can’t have people pouring into our country like they have over the last 10 years.”

THE REALITY

Illegal border crossings have been declining for nearly two decades. In 2017, border-crossing apprehensions were at their lowest point since 1971.

Undetected illegal border crossings have dropped at an even faster rate, from