Washington (CNN) Rep. Xochitl Torres Small, one of a small group of House Democrats who had not yet publicly stated their support for an impeachment inquiry, announced on Thursday that in light of recent actions by President Donald Trump and his administration she's in favor of proceedings.

"Earlier this week, the President and his administration made it clear to New Mexicans that they are not committed to finding the truth," the New Mexico Democrat wrote in an op-ed in the Las Cruces Sun-News announcing her support for an inquiry.

The congresswoman argues that the President and the administration "took unprecedented steps to prevent the facts from coming forward," when "the White House and the State Department stopped a key witness from testifying before Congress and the White House issued a letter refusing to cooperate at all with the investigation."

Earlier this week, the State Department directed US Ambassador to the European Union Gordon Sondland not to testify before Congress. House Intelligence Chairman Adam Schiff on Tuesday called the move "strong evidence of obstruction" of Democrats' impeachment investigation, and House Democrats issued a subpoena in response.

Also on Tuesday, the White House sent a letter to congressional Democrats in which Trump's lawyers said the President and his administration won't cooperate in an ongoing impeachment inquiry, arguing that the proceedings amount to an illegitimate effort to overturn the 2016 election results.

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