President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE early Wednesday tweeted support for his son, saying the furor over Donald Trump Jr.’s meeting with a Russian lawyer who offered compromising information about Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE “the greatest Witch Hunt in political history.”

“My son Donald did a good job last night. He was open, transparent and innocent. This is the greatest Witch Hunt in political history. Sad!” the president said.

My son Donald did a good job last night. He was open, transparent and innocent. This is the greatest Witch Hunt in political history. Sad! — Donald J. Trump (@realDonaldTrump) July 12, 2017

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Trump Jr. late Tuesday said he would be willing to testify about his meeting.

“You have nothing to hide,” Fox News host Sean Hannity said during an interview with Trump Jr. “That means you'll testify under oath, all of that?"

“All of it,” Trump Jr. responded.

He also said he likely would have "done things a little differently" in retrospect.

Trump Jr. earlier in the day released a stunning chain of emails detailing his conversations about setting up the election-year meeting.

The information “would incriminate Hillary and her dealings with Russia and would be very useful to your father,” reads one of the emails from Rob Goldstone, who acted as an intermediary to set up the meeting.

“This is obviously very high level and sensitive information but is part of Russia and its government's support for Mr. Trump,” wrote Goldstone.

The president on Wednesday also took a shot at the news media for using unidentified sources in coverage of his son.

“Remember, when you hear the words "sources say" from the Fake Media, often times those sources are made up and do not exist,” he tweeted.

Remember, when you hear the words "sources say" from the Fake Media, often times those sources are made up and do not exist. — Donald J. Trump (@realDonaldTrump) July 12, 2017

The president on Tuesday evening said his son is a “great person who loves our country!” in a tweet promoting Trump Jr.'s appearance on the Fox News show.

My son, Donald, will be interviewed by @seanhannity tonight at 10:00 P.M. He is a great person who loves our country! — Donald J. Trump (@realDonaldTrump) July 12, 2017

White House spokeswoman Sarah Sanders earlier in the day read a statement from the president, who called his son is a “high-quality person.”

President Trump in the statement also applauded Trump Jr.’s “transparency.”

Sanders then referred any questions over the matter to attorneys.

--This report was updated at 7:24 a.m.