Nothing illegal happened when Donald Trump Jr. met with a Russian lawyer promising opposition research as a part of the Kremlin's attempt to help his father's campaign, President Trump's lawyer said Sunday.

Jay Sekulow, one of Trump's attorneys, told "Fox News Sunday" the June 2016 meeting between Trump Jr. and senior members of the Trump campaign and a Russian attorney was not out of the ordinary.

"What took place … was not a violation of the law, there's not a violation of the law," he said. "The question is the level of Russia's engagement on a global scale against the United States. That's being investigated."

In an interview that often grew animated and tense, Sekulow denied the Trump campaign showed a willingness to collude with the Russian government because Trump Jr. took the meeting after being told the Kremlin wanted to help Trump win the election.

It does not appear that any incriminating information was exchanged in the meeting, which ended up being about the Magnistky Act and American adoption of Russian children, but it wouldn't have been illegal if it had, Sekulow said.

"Nothing in that meeting that would have happened, if there was an opposition research from the attorney, would have been illegal," he said.

Sekulow added he didn't think denials of colluding with the Russian government now mean less in the wake of Trump Jr.'s revelations.

"I do not think the denials of the president of the United States are suspect at all," he said.