The powerful committee chairman says he is sending the President's eldest son the request in a letter.
"Obviously it would be appropriate for anybody to get into anything that went on at that meeting, and he was at that meeting", Grassley told Iowa reporters.
Veselnitskaya herself denied any connection to the Kremlin, said she did not request a meeting with Trump Jr. during the 2016 presidential campaign, and noted that she has no information damaging Clinton.
Manafort discovered a meeting of the Senate and the House intelligence committee, which looked at possible coordination between the Russian and the Trump campaign, for example, Robert Mueller, a former director of the Federal Bureau of Investigation, who was named Special Advisor to the Department of Justice.
Although he's entangled in the larger web created by the Russian Federation probes, Manafort previously disclosed this meeting to congressional investigators before Trump Jr. leaked his emails - but he wasn't required to disclose the content of it.
OPEC compliance with production cuts at lowest in six months, IEA says
As of 2016, the USA average daily export rate was just 520,000 bpd, although in May, the average daily was 1.02 million barrels. U.S. crude production has been growing steadily, topping more than 9 million barrels a day in February, according to the U.S.
The move comes after Trump Jr. not only admitted he met with a Russian government attorney in an attempt to obtain damaging information on then-presidential candidate Hillary Clinton, but on Tuesday posted a four-page email showing he arranged the meeting.
The display showed Short talk to a music publisher who wanted to find a Russian government lawyer who would apparently take Clinton's dirt as 'part of Russian government support.
"There's probably more questions about this that these e-mails will raise and we look forward to having a chance to speak with Mr. Trump Jr. about this", said Republican Representative Chris Stewart, who serves on the committee.
In an interview before departing Wednesday evening for France, Trump told Reuters that he didn't know about the meeting "until a couple of days ago when I heard about this". Diane Feinstein of California are working with Special Counsel Robert Mueller to ensure Manafort's appearance does not conflict with any criminal investigation being overseen by Special Counsel Robert Mueller.
The younger Trump is a key player in the controversy over Russia's meddling in the 2016 election.
Nevertheless, the revelation renewed accusations of collusion between the Trump campaign and the Russian government - accusations the White House has strongly denied.
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