WASHINGTON — President Donald Trump's attorney Rudy Giuliani said Sunday that a 2016 meeting at Trump Tower between top Trump campaign officials and a Russian government ally could not be evidence of collusion even though the intention of the meeting was to get damaging information on Democratic presidential candidate Hillary Clinton.

Appearing on NBC's "Meet the Press," Giuliani brushed aside the idea that special counsel Robert Mueller could rely on the meeting for any possible charges against the president.

"It turned out to be a meeting about another subject and it was not pursued at all. Any meeting in regards to getting information about your opponent is something any candidate's staff would take," Giuliani said on "Meet the Press."

"The president of the United States wasn't at that meeting, he didn't know about that meeting, he found out about it after. By the time he found out about it, it was nothing. If this is their case for collusion, good luck Mueller."

The meeting in question took place at Trump Tower in June of 2016, when Donald Trump Jr., Trump son-in-law Jared Kushner and then-campaign chairman Paul Manafort met with a Russian lawyer with the understanding that she would pass along damaging information about Clinton, Trump's opponent in the presidential race.

Since the existence of the meeting was revealed in 2017, Trump and his team have issued a flurry of conflicting statements about it amid the backdrop that the special counsel's investigation could be looking at the meeting as it investigates Russian collusion in the election.

At first, the White House said that the participants "primarily discussed a program about the adoption of Russian children." And it denied that Trump himself had anything to do with that statement.

But subsequently, Trump Jr. admitted he took the meeting because he wanted "political opposition research about Clinton." And the White House admitted the president was personally involved in drafting the initial statement.

Trump contradicted his earlier statement this month, when he tweeted that the meeting was taken “to get information on an opponent."

Fake News reporting, a complete fabrication, that I am concerned about the meeting my wonderful son, Donald, had in Trump Tower. This was a meeting to get information on an opponent, totally legal and done all the time in politics - and it went nowhere. I did not know about it! — Donald J. Trump (@realDonaldTrump) August 5, 2018

Giuliani echoed the president's sentiment on Sunday, questioning whether the Trump officials knew they were meeting with someone with ties to the Russian government.

"She didn’t represent the Russian government, she’s a private citizen. I don’t even know if they knew she was Russian at the time. All they had was her name," he said.

Emails released by Trump Jr. show he emailed with publicist Rob Goldstone to set up the meeting and that Goldstone specifically tied the information to the Russian government.

"This is obviously very high level and sensitive information but is part of Russia and its government's support for Mr. Trump,” Goldstone wrote.

Trump Jr. replied to that email: "If it's what you say I love it especially later in the summer."

Giuliani also threw more cold water on the prospect of the president testifying in the special counsel's investigation, arguing he wants to avoid Trump getting "trapped into perjury."

"When you tell me that, you know, he should testify because he’s going to tell the truth and he shouldn’t worry, well that’s so silly because it’s somebody’s version of the truth, not the truth," he said.

"Truth isn't truth," Giuliani added, pointing to the accusations that Trump discussed the investigation into his former national security adviser, Michael Flynn, in a meeting with then-FBI director James Comey, who Trump later fired.

"Donald Trump says: I didn't talk about Flynn with Comey. Comey says: You did talk about it. So tell me, what the truth is?"

Giuliani spoke with "Meet the Press" one day a New York Times story revealed that White House counsel Don McGahn has been fully cooperating with the special counsel's investigation and has sat for 30 hours of interviews over nine months.

While Giuliani admitted that he doesn't know exactly what McGahn has told Mueller's team, he said he has a "good sense" of what the White House counsel said from former Trump attorney John Dowd.

Giuliani accused the special counsel of being "desperate" and leaking McGahn's cooperation "illegally" to the New York Times.