One of the most recent, interesting revelations to emerge from the entire Russia-Trump Jr.-kerfluffle is that Natalia Veselnitskaya, the attorney with whom Trump's son met, was actually allowed entry into the US by the Obama administration after having initially been denied. 

Citing "extraordinary circumstances," the Obama Justice Department granted the lawyer entry without a visa so she could lobby against a US human rights law dubbed the Magnitysky Act. The Hill reports 

Later, a series of events between an intermediary for the attorney and the Trump campaign ultimately led to the controversy surrounding the president's eldest son.

Just five days after meeting in June 2016 at Trump Tower with Donald Trump Jr., presidential son-in-law Jared Kushner and then Trump campaign chairman Paul Manafort, Moscow attorney Natalia Veselnitskaya showed up in Washington  in the front row of a House Foreign Affairs Committee hearing on Russia policy, video footage of the hearing shows.

She also engaged in a pro-Russia lobbying campaign and attended an event at the Newseum in Washington, D.C. where Russian supporters showed a movie that challenged the underpinnings of the U.S. human rights law known as the Magnitysky Act, which Russian leader Vladimir Putin has reviled and tried to reverse.

The Magnitsky Act imposed financial and other sanctions on Russia for alleged human rights violations connected to the death of a Russian lawyer who claimed to uncover fraud during Putin's reign. Russia retaliated after the law was passed in 2012 by suspending Americans' ability to adopt Russian children.

But in an interview with NBC News earlier this week, Veselnitskaya acknowledged her contacts with Donald Trump Jr. and in Washington were part of a lobbying campaign to get members of Congress and American political figures to see "the real circumstances behind the Magnitsky Act.”

That work was a far cry from the narrow reason the U.S. government initially gave for allowing Veselnitskaya into the U.S. in late 2015, according to federal court records.

The Hill notes that the Russian lawyer "had been turned down for a visa to enter the U.S. lawfully but then was granted special immigration parole by then-Attorney General Loretta Lynch for the limited purpose of helping a company owned by Russian businessman Denis Katsyv, her client, defend itself against a Justice Department asset forfeiture case in federal court in New York City." The report continues: 

During a court hearing in early January 2016 as Veselnitskaya’s permission to stay in the country was about to expire, federal prosecutors described how rare the grant of parole immigration was as Veselnitskaya pleaded for more time to remain in the United States.

“In October the government bypassed 
the normal visa process and gave a type of extraordinary 
permission to enter the country called immigration parole,” Assistant U.S. Attorney Paul Monteleoni explained to the judge during a hearing Jan. 6, 2016.

“That's a discretionary act that the statute allows the Attorney 
General to do in extraordinary circumstances. In this case, we 
did that so that Mr. Katsyv could testify. And we made the 
further accommodation of allowing his Russian lawyer into the 
country to assist,” he added.

As the Hill notes "this revelation means it was the Obama Justice Department that enabled the newest and most intriguing figure in the Russia-Trump investigation." Indeed. Once again, it would seem Lynch has some "'splaining to do."