The American Civil Liberties Union (ACLU) on Tuesday said it would ask for a court order preventing the Trump administration from reallocating military funds to use for border wall construction.

The ACLU's announcement came after the administration notified lawmakers Tuesday that it would move forward with redirecting the $3.6 billion from military construction projects for use at the border.

“The fact that the government sat on these so-called ‘emergency funds’ for seven months further confirms that this is nothing but an unlawful power grab," said ACLU attorney Dror Ladin in a statement.

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"We’ll be back in court very soon to block Trump’s latest effort to raid military funds for his xenophobic wall,” he added.

Defense Secretary Mark Esper Mark EsperOvernight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Official: Pentagon has started 'prudent planning' for full Afghanistan withdrawal by May MORE called congressional leaders, including House Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) and Senate Minority Leader Charles Schumer Chuck SchumerPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' 3 reasons why Biden is misreading the politics of court packing Cruz blocks amended resolution honoring Ginsburg over language about her dying wish MORE (D-N.Y.), on Tuesday to inform them of the reallocation decision.

Schumer slammed the move as a "slap in the face" to military members.

Pentagon officials also said that Esper approved using $3.6 billion in Defense Department dollars to build 175 miles of wall on U.S.- Mexico border.

The ACLU first sued the Trump administration to prevent it from repurposing the money after President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's February emergency declaration. He declared the emergency in order to gain access to additional money for the wall after Congress passed a spending bill that only gave $1.35 billion for the border.

The Supreme Court ruled in July that the administration could start using $2.5 billion in military funding for the wall while litigation on the matter plays out.

An ACLU spokesperson told The Hill that the statute President Trump is invoking for using the $3.6 billion is different from the statute invoked for the $2.5 billion.