U.S. President Donald Trump declared Wednesday that his eldest son was "open, transparent and innocent," a day after Donald Trump Jr. revealed his eagerness to hear damaging information about Hillary Clinton from the Russian government in a meeting last year with an attorney from Moscow.

Defending his son's conduct, the president again dismissed the ongoing Russia investigation as the "greatest witch hunt in political history." Trump responded after Donald Trump Jr. disclosed a series of emails on Tuesday that marked the clearest sign to date that Trump's campaign was willing to consider election help from a longtime U.S. adversary.

'What's the problem here?'

Russian Foreign Minister Sergey Lavrov said didn't he understand why the meeting, which Trump Jr. has acknowledged, was becoming such a large issue.

Lavrov asked, "What is the problem Here?"

The lawyer, Natalia Veselnitskaya denies having any compromising information about Clinton.

Lavrov referred to Russian President Vladimir Putin's earlier comments that the current controversy was the result of someone "trying to contest the election results."

The email exchange posted to Twitter by Donald Trump Jr. showed him conversing with a music publicist who wanted him to meet with a "Russian government attorney" who supposedly had dirt on Clinton as "part of Russia and its government's support for Mr. Trump." The messages reveal that Trump Jr. was told the Russian government had information that could "incriminate" Clinton and her dealings with Russia.

"I love it," Trump Jr. said in one email response.

The president's attorney, Jay Sekulow, said in an interview with NBC's Today that Trump Jr. did not violate any laws by accepting the meeting. He said the president had not been aware of Trump Jr.'s June 2016 meeting and didn't find out about his son's email exchange until "very recently."

Sekulow said the president was not being investigated by former FBI director Robert Mueller, the special counsel investigating the Trump campaign and its interaction with Russia during the election. "I would know a little bit about it. I'm one of the lawyers," Sekulow told ABC's Good Morning America.

As the emails reverberated across the political world, Trump Jr. defended his actions in an interview with Fox News, blaming the decision to take the meeting on the "million miles per hour" pace of a presidential campaign and his suspicion that the lawyer might have information about "underreported" scandals involving Clinton. Trump Jr. said the meeting "really went nowhere" and that he never told his father about it because there was "nothing to tell."

"In retrospect I probably would have done things a little differently," Trump Jr. said.

Democrats in Congress voiced outrage and insisted the messages showed clear collusion, with California's Adam Schiff, the top Democrat on the House intelligence committee, declaring that "all of the campaign's previous denials obviously now have to be viewed in a different context."

Yet Republicans — who stand the most to lose politically from Trump's Russia ordeal — did not join in the condemnation. Senate Majority Leader Mitch McConnell said he was confident Senate investigators would "get to the bottom of whatever happened." And Sen. Susan Collins, a Maine Republican on the intelligence committee, cautioned that the emails were "only part of the picture."

Son is 'a high quality person' says Trump

Trump Jr., who was deeply involved in his father's presidential campaign, portrayed his decision to release the emails as an effort "to be totally transparent." In fact, they had already been obtained by The New York Times.

The messages were the latest disclosure to roil the multiple, ongoing investigations into Russia's interference in the election and potential collusion with Trump's campaign. U.S. intelligence agencies have said the Russian government meddled in the election through hacking to aid Trump.

The emails will almost certainly be reviewed for any signs of coordination with the Kremlin, which the White House and Trump Jr. have repeatedly said did not take place. A spokesperson for Mueller, the former FBI director, declined to comment.

In the emails — dated early June 2016, soon after Trump secured the GOP nomination — music publicist Rob Goldstone wrote to Trump Jr. to connect him to Russian attorney Veselnitskaya. Goldstone wrote that the information "would be very useful to your father."

"If it's what you say I love it especially later in the summer," Trump Jr. replied in one of the emails. Days later, Veselnitskaya met with Trump Jr. on June 9 at Trump Tower in New York. Veselnitskaya has denied ever working for the Russian government. The Kremlin has also denied any link to the lawyer.

Rob Goldstone

Music publicist Rob Goldstone is seen in a Facebook photo from his account while in Moscow in September 2013. (Facebook)

The emails show Goldstone telling Trump that singer Emin Agalarov and his father, Moscow-based developer Aras Agalarov, had "helped along" the Russian government's support for Trump. The elder Agalarov was involved with Trump in hosting the 2013 Miss Universe pageant in Moscow. The two men once also had preliminary discussions about building a Trump Tower in Moscow, but the talks fell through. Trump also appeared in a music video with the younger Agalarov.

In his email, Goldstone said that the "Crown prosecutor of Russia" offered to provide the information on Clinton to the Trump campaign in a meeting with Aras Agalarov. There is no such royal title in the Russian Federation, but Goldstone — who is British — may have been referring to the title given to state prosecutors in the United Kingdom.

In Russia, the top justice official is Prosecutor General Yury Chaika, the equivalent of the attorney general in the United States. Chaika is longtime confidant of Putin's and was directly appointed by him.

Representatives for the Agalarovs didn't respond to requests for comment on Tuesday. Attempts to reach Chaika at his office were unsuccessful.

Speaking to reporters Wednesday in Moscow, Putin's spokesperson Dmitry Peskov insisted the Kremlin has not spoken to Agalarov and has no ties to the Russian lawyer who was at the meeting.