Declared a national emergency at the southern border to redirect roughly $6–8 billion — including billions appropriated by Congress for the military — to border-wall construction after Congress declined to fund it, following the longest government shutdown in U.S. history.
Presidential proclamation invoking the National Emergencies Act to divert Defense and Treasury funds.
Negative impactsubstantiated
Diverted military funds in a way courts found unconstitutional.
About $2.5B in DoD counter-drug funds and $3.6B in military-construction funds were redirected; in 2020 the Ninth Circuit ruled the reallocation violated the separation of powers.
Mixed impactsubstantiated
The Supreme Court allowed construction to proceed during litigation.
In a 5-4 stay (July 2019) the Court let building continue; hundreds of miles of barrier were ultimately replaced or newly built.
Positive impactcontested
Supporters said it delivered on border security Congress wouldn't fund.
The administration argued the emergency was justified by border crossings and drug flows.