News of the payment came as controversy has swirled in recent days around Trump Jr. and a meeting he held in June 2016 with a Kremlin-connected lawyer who was said to have potentially damaging information about Hillary Clinton, the Democratic opponent of Trump's father in the presidential election.
He initially told The New York Times that it was about Russian adoptions.
Donald Trump Jr. said he wanted to be transparent about the ongoing issue; hence, he has decided to disclose his conversation with the British publicist.
Trump's son-in-law, Jared Kushner, and then-campaign chairman Paul Manafort with Russian attorney Natalia Veselnitskaya at Trump Tower in June 2016. Bodies including both the House and Senate Intelligence Committees and the Department of Justice in the form of a Special Prosecutor are looking into the matter.
The allegations have cast a cloud over Mr Trump administration since he took office.
President Donald Trump sent a blast of tweets Sunday morning criticizing Hillary Clinton and the liberal media while thanking his supporters. He also said that the responsibility for Donald Jr.'s initial incomplete statement about the meeting lies with Trump's son and not the president.
He said he served in the Soviet military in a unit that was part of counterintelligence but he was never trained as a spy. "You know what it's like to be on a campaign", he told Hannity.
After Sekulow's comments aired, the Secret Service responded that it wouldn't have checked out the participants of the meeting because Trump's eldest son wasn't in their charge. "In the private sector, they're used to making deals any way they can". And before that meeting, Trump Jr. purportedly learned of the Kremlin's involvement in this transmission of information.
Sekulow said he was not aware of any other meetings involving Russians.