A Washington Post reporter on Tuesday pushed a story about President Trump's father being arrested "at a KKK march" in the 1920s, although it seemed to reference a Memorial Day parade, and it's at best unclear why the elder Trump was detained and discharged by the police.

Michael Kranish, an investigative reporter for the Post and co-author of a biography on Trump, wrote Tuesday on Twitter, a day after Trump condemned violence at a white supremacy rally, "We tell the full story of the arrest of [Trump's] father's at a KKK march starting p. 27 in 'Trump Revealed.'"

Attached was a photo of the page from the book that describes a riot that broke out during a 1927 Memorial Day parade, not a KKK march, in New York City after Klan members ignored instructions not to attend wearing their white robes.

An article in the New York Times from that time described the incident and said several people were arrested, some for violence. It said only that Fred Trump "was discharged" but had no other information about his role at the scene.

The Washington Post last year revisited the episode in a blog post written by Philip Bump headlined, "In 1927, Donald Trump's father was arrested after a Klan riot in Queens."

But even that story conceded that, "It's not clear from the context what role Fred Trump played in the brawl."

The story was later updated to say "A contemporaneous article from the Daily Star notes that Trump was detained 'on a charge of refusing to disperse from a parade when ordered to do so,'" though the paper's headline still suggested Trump's father was directly involved in the Klan riot.

Reached by email, Michael Kranish explained his tweet, saying, "If you have 'Trump Revealed,' read the full description, which continues on page 28. It's all explained and very fairly."

Asked about whether his initial tweet, which does not contain the context, gave a false impression about Trump's father, Kranish said his book "makes 100 percent clear that the KKK march was part of a Memorial Day parade."

Others who saw the Kranish's post on Twitter believed he was missing key context from the parade.

David Martosko, a White House reporter who is friendly with the Trump administration, replied to the tweet, saying, "This makes it sounds like he was a participant. He wasn't."

"You are intentionally being misleading," another person replied to Kanish. "Trying to make it seem as if he took part in this. Didn't work."

Kranish's tweet came as Trump is under intense scrutiny in light of a white supremacy protest on Saturday in Charlottesville, Va., that blew up in violence, resulting in one death and several injuries. The president did not immediately condemn racism specifically though he did in a public statement on Monday.

Update: After being contacted by the Washington Examiner for this story, Kranish posted a second page from his book to Twitter with a fuller account of Fred Trump's arrest.