The House Homeland Security Committee is moving forward with two articles of impeachment. The White House has called the GOP effort “unconstitutional.”

House Republicans took a significant step forward Sunday in their effort to impeach Homeland Security Secretary Alejandro Mayorkas by formalizing their allegations ahead of a committee vote.

Republicans allege in the first impeachment article that Mayorkas displayed a “willful and systemic refusal to comply with the law,” while the second article argues that he breached public trust by having “knowingly made false statements, and knowingly obstructed lawful oversight of the Department of Homeland Security.”

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The Department of Homeland Security responded Sunday with a memo saying Republicans “undermined efforts to achieve bipartisan solutions and ignored the facts, legal scholars and experts, and even the Constitution itself in their quest to baselessly impeach Secretary Mayorkas.”