Mueller agreed to accept Trump's answers in writing - although the prosecutor could still seek Trump's testimony in person - after nearly a year of negotiations with Trump's attorneys.
Giuliani said in the statement on Tuesday the president had provided "unprecedented cooperation" with the probe over the past year and a half, noting that more than 30 White House-related witnesses had been questioned and 1.4 million pages of material turned over before Trump responded to the pre-election questions in writing.
Another of Trump's lawyers, Rudy Giuliani, said the lawyers continue to believe that "much of what has been asked raised serious constitutional issues and was beyond the scope of a legitimate inquiry".
This is important, Giuliani said, because it also shows that Mueller would be totally unjustified in subpoenaing the president to testify.
"Mueller certainly could have forced the issue and issued a subpoena, but I think he wants to present a record of having bent over backwards to be fair", Wisenberg said.
The president told reporters last week that he had prepared the responses himself. Giuliani said they did not address allegations of obstruction of justice.
His lawyer, Jay Sekulow, said the questions answered in writing were exclusively related to the issue of Russian Federation and did not take into account suggestions that the president has tried to obstruct the investigation - notably through his sacking of former FBI director James Comey.
If Mueller is unsatisfied with Trump's answers, he can move to subpoena the president.
Scattered tax protests persist in France; injuries up to 409
Overall 52 people had been detained across France and 106 people had been injured, five seriously, the interior ministry said. Police questioned 282 protesters in total, 73 during the night, of which 157 were taken into custody.
In 2016, USA intelligence agencies concluded that Russian Federation had used a state-authorised campaign of cyber attacks and fake news stories planted on social media in an attempt to turn the election against Democrat candidate Hillary Clinton.
Trump has denied any collusion with Moscow and has called the Mueller investigation a "witch hunt".
The president has insisted in the past that he didn't know at the time about the meeting, which was initially expected to be about opposition research related to Hillary Clinton.
"We have made it clear to them that we think that it would be unfair to the president and even the country if they held up concluding things on the president just because they have questions on other people where right now there is no connection or any evidence the president is connected with that", Giuliani said.
Other questions may have touched on WikiLeaks founder Julian Assange and Roger Stone, a longtime Trump ally with ties to WikiLeaks, who also is under investigation.
For now, Mueller will comb through Trump's responses, a format with downsides to both parties. As a private citizen, Whitaker criticized the Mueller probe.
In an interview that aired on Sunday, he told "Fox News Sunday" that he was unlikely to do so, explaining that "we've wasted enough time on this witch hunt and the answer is, probably, we're finished".