money to build the Mexican border wall is in the defense budget. The Pentagon's budget was part of a spending bill that became law Friday.

The money for the wall is secured.

FYI

https://www.cnsnews.com/news/article/susan-jones/trump-suggests-using-military-funds-build-his-wall

https://www.bostonglobe.com/news/politics/2018/03/27/trump-privately-presses-for-military-pay-for-border-wall/lfttKj6Hr15VvmqOsiPP8K/story.html