On Tuesday, Donald Trump Jr. released private emails showing that he agreed to meet with Russian lawyer Natalia Veselnitskaya during his father's election campaign.
Trump's advisor and son-in-law Jared Kushner and then-campaign manager Paul Manafort were also in the meeting. However, the participants intended to discuss US adoption policies of Russian children and the Magnitsky Act, but not sensitive information related to Democratic candidate Hillary Clinton, according to Trump Jr.'s statement.
Caputo noted he had no knowledge of Trump son's meeting with Veselnitskaya. The former adviser added that in general, there was more opposition research offered to the Trump campaign than he has ever seen in 30 years in elections.
Kremlin spokesman Dmitry Peskov said on Wednesday that Veselnitskaya did not represent the Russian government, and Veselnitskaya told NBC News on Tuesday that she never had any ties to the Kremlin or compromising information on Clinton.
Russia has earlier denied accusations of meddling in the November 8 election and has called such allegations absurd.