Donald Trump Jr received and opened a letter containing an unidentified white powder inside of it Monday evening, sources tell ABC News.

After the New York AG rested her civil fraud case against Donald Trump last week, the defense will present its case beginning Monday with testimony from Donald Trump Jr.

The Trump Organization's $250 million fraud trial becomes a family affair Wednesday when Donald Trump Jr. becomes the first of Donald Trump's children to take the stand.

New York's attorney general spoke to Ivanka and Donald Trump Jr. in its investigation into how the Trump Organization valued properties it owned.

The president's oldest son met with the committee on Tuesday.

The House Jan. 6 committee on Friday interviewed Kimberly Guilfoyle, the fiancee of Donald Trump Jr. and a GOP operative and fundraiser.

Trump Jr. is the second of the president's children to test positive.

Twitter has temporarily limited the account belonging to Donald Trump Jr, President Donald Trump's eldest child, after he posted content that violated company policy.

President Donald Trump’s son, Donald Trump Jr., appeared on ABC’s The View on Thursday.

Donald Trump Jr has agreed to meet with the Republican-controlled Senate Intelligence committee for another interview, according to sources familiar with the matter.

McConnell predicts "happy ending" to Senate Intelligence Committee probe.

President Trump’s eldest son, Donald Trump Jr, has been subpoenaed to appear before the Senate Intelligence Committee, three sources familiar with the matter say.

The president's eldest son made a surprise intervention in the Brexit debate.

Investigators are planning to ask Donald Trump Jr. to return to Capitol Hill.

Donald Trump Jr. posted on Instagram that his father's tweet about Warren was "savage."

"We will always have tremendous respect for each other," they said.

A Massachusetts man was arrested for allegedly sending a letter with white powder addressed to Donald Trump Jr. in New York.

Trump Jr. 'liked' Twitter posts that contained conspiracies about the shooting.

The president's son said such accusations are terrible.

Committee "integrity and credibility should never be in question,” he wrote.

The president's son was questioned largely by Democratic lawmakers.

The president's oldest son was in Kansas to attended a Kobach fundraiser.

The committee already met with four participants of a 2016 Trump Tower meeting.

He says he spoke with WikiLeaks during the 2016 campaign via Twitter

The president's son also attended a campaign fundraiser for the GOP congressman.

Investigators said questions remain.

His meeting with a Russian lawyer will likely be discussed.

She is a longtime regulatory lawyer

Sanders said Trump Jr.'s emails are not a part of "politics as usual" and "we have some very strong evidence ... of collusion" in the Russia probe.

A number of details have emerged.

There have been changes to the versions of events.

Manafort is not committed to an appearance before the committee.

An attorney for Ike Kaveladze said there was no discussion of Hillary Clinton.

He joined a Russian lawyer in the June 9, 2016, meeting.

In an interview with Fox News, he describes the meeting as "nothing."

Trump Jr., 39, is President Trump's eldest child from his three marriages.

Trump attorney Jay Sekulow said the meeting between Trump campaign associates and a Russian lawyer was "not illegal."

A number of players have weighed in but questions remain.

"It is absolutely unacceptable that Russia ... meddled in our elections," Ryan said.