“After three years of lies and smears and slander, the Russia hoax is finally dead,” Mr. Trump declared. “The collusion delusion is over.”

In his first rally since the end of the 22-month investigation, the president gleefully disregarded the old saw about revenge being a dish best served cold. He came onstage hot and served up one scorching zinger after another, taking particular delight in ridiculing Representative Adam B. Schiff of California, who oversees the House Intelligence Committee, and other Democrats who have led calls to investigate Mr. Trump. ...

Mr. Trump has always peppered his speeches with “hells” and “damns,” but on Thursday, he crossed the line into cruder language.

“The Democrats need to decide whether they will continue to defraud the public with ridiculous [bulls---],” the president said.

In vilifying his opponents, Mr. Trump was not troubled by the fact that the 300-plus-page report by Robert S. Mueller III, the special counsel, has yet to be released, or that Attorney General William P. Barr, in his summary of Mr. Mueller’s findings, stipulated that the report did not exonerate the president, even if it did not find him guilty of conspiracy or of obstructing justice.