Donald Trump floats using military budget to pay for border wall

President Donald Trump is floating the idea of using the military’s budget to pay for his long-promised border wall with Mexico.

Trump raised the idea with House Speaker Paul Ryan at a meeting last week, according to a person familiar with the discussion who spoke on condition of anonymity.

READ MORE: Donald Trump denies plans for Mexico wall have changed — but his chief of staff disagrees

And he’s tweeted that building “a great Border Wall” is “all about National Defence” and called to “Build WALL through M!”, meaning the military.

Departments have limited authority to reprogram funds without congressional approval.

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READ MORE: Donald Trump renews call for wall after U.S. border agent killed

Trump threatened to veto the omnibus spending bill last week in part because it didn’t include the $25 billion he wanted to build his wall, one of his top campaign promises.

WATCH: Appropriation Bill includes $1.6 B for U.S.-Mexico border wall

1:56 Appropriation Bill includes $1.6 B for U.S.-Mexico border wall

Trump also insisted he’d make Mexico pay for it. Mexico has refused.