A federal judge dismissed former President Trump’s lawsuit against Hillary Clinton, her allies, Democratic lawyers and the left-leaning law firm of Perkins Coie on Thursday, saying Mr. Trump’s legal team did not adequately file the complaint or use current case law, which hadn’t been overruled.

Judge Donald M. Middlebrooks, a Clinton appointee, said Mr. Trump’s filing was too lengthy, detailing events that “are implausible because they lack any specific allegations which might provide factual support for the conclusions reached.”

Mr. Trump had sued the Democratic officials claiming they violated the Racketeer Influenced and Corrupt Organizations Act, as they allegedly worked together to create a false narrative that Mr. Trump colluded with a “hostile foreign sovereignty.”

The judge, though, didn’t buy into his legal arguments.

“What the Amended Complaint lacks in substance and legal support it…