WASHINGTON (AP) — Special counsel Robert Mueller expressed frustration to Attorney General William Barr last month about how the findings of his Russia investigation were being portrayed, saying he worried that a letter summarizing the main conclusions of the probe lacked the necessary context, a Justice Department official said Tuesday night.

Mueller communicated his agitation in a letter to the Justice Department sent just days after Barr issued a four-page document to Congress and to the public that summarized the special counsel's conclusions about whether President Donald Trump's campaign...