I keep up-to-date a big PDF file full of stats and graphics about security and migration issues at the U.S.-Mexico border. Right now, it’s 2.2 megabytes and 36 pages long, and you can download it here or, more memorably, at the shortcut bit.ly/2019wolaborder.
It covers migration, Border Patrol staffing, the immigration court backlog, and security measures like terrorism, drugs, and so-called “spillover” violence (which doesn’t happen).
I just updated it again, with the March migration data that CBP released last week, while I was traveling at the border. Incidentally, I’ve screenshot every instance of that monthly report since it was first released in May 2014.