(CNN) The Trump administration is preparing to take money from military construction funds more than six months after first promising to do so in order to build sections of the wall along the US-Mexico border, according to multiple administration and defense officials.

Though it's unclear which military construction would be put on hold, the move could put at risk projects such as command and control, drone, cyber and training facilities in the US and overseas.

White House officials have held talks in the last weeks to begin planning for the move, two administration officials said, which would shift funds from the Department of Defense's military construction budget to fund the border wall. The move would rely on President Donald Trump's February emergency declaration, which has faced stiff legal challenges.

In July, however, the Supreme Court cleared the way for the Trump administration to use $2.5 billion in counter-drug funding from the Department of Defense to construct parts of the wall while a court battle plays out over whether the government had the authority to divert funds that were not appropriated for the wall.

The use of these additional military construction funds could invite a new legal challenge.

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