The judge overseeing the case against Mr. Mangione said the evidence underpinning two of the most serious counts, one of which charged him with first-degree murder, was “legally insufficient.”

The Trump administration ordered a Civil War-era war image removed from a National Park site in Georgia as it moves to promote what it considers a more positive view of American history.

The idea that there is more left-wing extremist violence than right-wing extremist violence is a dangerous myth.