Attempts to cross the U.S.-Mexico border surged in March

The number of apprehensions during attempts to cross the United States-Mexico border spiked last month, following record low numbers during President Trump's first year in office, according to data from U.S. Customs and Border Protection.

Data: U.S. Customs and Border Protection; Chart: Lazaro Gamio / Axios

The big picture: Trump has recently stepped up his calls for increased border security — including days of fiery tweets — and called for sending the National Guard to the border until a wall is built. And just this morning, he claimed via tweet: “Because of the Trump Administrations actions, Border crossings are at a still UNACCEPTABLE 46 year low. Stop drugs!”