Representatives Brad Sherman and Al Green also ratcheted up the pressure by introducing articles of impeachment against the president on July 12, citing obstruction of justice.

“Recent disclosures by Donald Trump Jr. indicate that Trump’s campaign was eager to receive assistance from Russia,” Sherman said in a statement. “It now seems likely that the President had something to hide when he tried to curtail the investigation of National Security Advisor Michael Flynn and the wider Russian probe. I believe his conversations with, and subsequent firing of, FBI Director James Comey constitute Obstruction of Justice.”

Previously undisclosed communications between Trump Jr. and an intermediary, public-relations executive Rob Goldstone, provide the most concrete evidence to date that the Trump campaign was willing to accept Russia’s help in the race for the US presidency.

Trump Jr. released the string of e-mails in question on Tuesday (July 11) in what he said was an effort to be “totally transparent,” after learning that the New York Times was going to publish the messages in short order. Within the chain, Goldstone tells Trump Jr. that he wants to connect him with a “Russian government lawyer” holding compromising information on Clinton, which Goldstone said was “part of Russia and its government’s support for Mr. Trump.” Trump’s eldest son replied: “If it’s what you say I love it.”

In an accompanying statement, Trump Jr. said that the meeting, which took place at Trump Tower in June of last year, yielded nothing “meaningful” and that there was no follow-up.

The president’s son later appeared on Fox News for an interview in which he expressed some measure of regret for his actions: “In retrospect, I probably would have done things a little differently,” he said.

The elder Trump told Reuters on July 12 that he had no knowledge of his son’s meeting with the Russian lawyer until “a couple of days ago.”

Speaking at a press conference alongside French president Emmanuel Macron in Paris today (July 13), Trump defended his son’s actions as par for the course of the political realities of a competitive campaign.

“It’s called opposition research,” Trump said. “I think it’s a meeting that most people in politics probably would have taken.”

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