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A senior Democratic senator lambasted President Donald Trump's administration on Tuesday after a judge handed the administration its latest loss in a high-profile immigration case.

On Tuesday, Judge Waverly Crenshaw Jr. of the Middle District of Tennessee handed down a ruling that found Trump prosecutors were conspiring with people in Washington, D.C. who "may or may not have acted with improper motivation," when bringing charges against Kilmar Abrego-Garcia, CNN's Jim Scuitto reported on "The Arena." Abrego-Garcia is a Salvadoran national who had lived in Maryland for several years with temporary protected status before the Trump administration illegally deported him in March.

Initially, the Trump administration blamed his deportation on an "administrative error" before returning Abrego-Garcia to the U.S. After he arrived, prosecutors then charged him with human trafficking, and at least one top Department of Justice official called the prosecution of Abrego-Garcia a "top priority," according to the ruling.

Sen. Chris Van Hollen (D-MD) bashed the Trump administration's treatment of Abrego-Garcia during an interview on CNN's "The Arena" on Tuesday, calling it a "smoking gun" for the vindictive prosecution charges.

"The Justice Department decided to bring these charges against him because he asserted his due process rights when they illegally shipped him off to CECOT in El Salvador," Van Hollen said. "This looks like another example of the Trump administration sometimes manipulating the facts to bring a vindictive case against Abrego-Garcia."