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Several GOP senators have expressed opposition to Trump's emergency declaration, warning it could set a precedent for a future president to declare an emergency to circumvent Congress on another issue, such as climate change or gun control.

As a result, it's possible Democrats in the Senate could win the handful of votes needed to pass the measure.

Trump would likely then veto the resolution, and it is not expected that the House and Senate would have the two-thirds majorities needed to override a veto.

The resolution states that the national emergency declared by Trump is "hereby terminated."

"President Trump’s emergency declaration proclamation undermines the separation of powers and Congress’s power of the purse, a power exclusively reserved by the text of the Constitution to the first branch of government, the Legislative branch, a branch co-equal to the Executive," she wrote in a letter to members on Wednesday.

Last week, after failing to secure more than $1.4 billion from Congress for any sort of border barrier, Trump declared an emergency that would allow him to reprogram funds from the Department of Defense. The order is also facing multiple legal challenges.