Mary Trump asks three key questions about her uncle’s attack on voting by mail
The president's niece, Mary Trump (screengrab)

President Donald Trump attacked voting by mail in a White House briefing on Monday.

Trump was asked a question on the topic by a reporter for the far-right cable news network OANN.

Trump threatened an executive order against mail-in voting, but did not provide specifics.

Mary Trump, the president's psychologist niece who wrote the bestselling book Too Much and Never Enough: How My Family Created the World's Most Dangerous Man, had three key questions:

Read a transcript of Trump's briefing: