How President Trump came to declare a national emergency to fund his border wall

President Trump knew that lawmakers were unlikely to ever give him the billions of dollars he wanted to build a wall on the southern border, so in early 2018, he gave aides a directive: Find a way to do it without Congress.

It was hardly an easy assignment. The White House had some flexibility to spend money the way it wanted, but could not move the necessary billions at will. Trump could declare a national emergency, but White House attorneys repeatedly warned him the risk of failure in court was high.

On Friday, Trump did it anyway. Stepping to a microphone in the Rose Garden, the president told reporters he was invoking his powers to declare a national emergency, then acknowledged what his lawyers had been warning him: He will get sued and, at least initially, will probably lose.

The remarkable moment, people familiar with the matter say, marked the culmination of months of heated internal deliberations between the White House Counsel’s Office, the Justice Department, the Office of Management and Budget, lawmakers and the president over how to fund the wall.

https://www.washingtonpost.com/world/national-security/how-president-trump-came-to-declare-a-national-emergency-to-fund-his-border-wall/2019/02/15/3e9f4348-3152-11e9-8ad3-9a5b113ecd3c_story.html

I like this excerpt from the article:

An ACLU lawyer responded on Twitter: “keep talking mr president.”