The Trump administration on Tuesday asked a federal judge to dismiss lawsuits challenging President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's declaration of a national emergency at the southern border.

Department of Justice lawyers said in one filing that the challenges "raise political questions that courts are not equipped to answer."

The lawyers also said the plaintiffs' arguments that the emergency is unconstitutional because it violates the separation of powers are invalid since "independent separation-of-powers concerns require dismissal of the President as a defendant because there is no cause of action against the President."

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The plaintiffs in the lawsuit are represented by the consumer rights group Public Citizen. The Trump administration on Tuesday also asked a judge to dismiss a similar lawsuit brought by the Center of Biological Diversity, according to Bloomberg News.

Allison Zieve, a lawyer with Public Citizen, told Bloomberg that the group expected the motion to be dismissed.

“We’re reviewing the motion now," Zieve added.

There are also several other lawsuits challenging the emergency, including one brought by attorneys general from 16 states.

The legal challenges are likely the last roadblock to Trump's emergency declaration after the House last week failed to override Trump's veto of legislation disapproving of the declaration.

Trump originally declared the emergency in February, saying that he would spend about $8 billion on barriers along the southern border.