The special counsel team took over the investigation when Mueller was appointed in May, and prosecutors from the Eastern District of Virginia were largely taken off the case.
Trying to build support among his core supporters, he said his enemies were "trying to cheat you out of the leadership you want with a fake story that is demeaning to all of us and most importantly, demeaning to our country and demeaning to our constitution".
"The stock markets are supported by steady growth in earnings", said Mutsumi Kagawa, chief global strategist at Rakuten Securities, noting steady growth in forward earnings in the United States, Japan and elsewhere.
On the recording, the reporter called the entire story that the Trump presidential campaign and transition team colluded with Russia "a Brennan operation".
Special counsel Robert Mueller has impaneled a grand jury to investigate Russia's interference with the 2016 presidential election, The Wall Street Journal reported Thursday - an important step toward potential criminal charges.
The grand jury in Virginia had issued a subpoena related to Flynn's business, the Flynn Intel Group, which was paid more than $500,000 by a company owned by a Turkish American businessman close to top Turkish officials, said people familiar with the matter. Many of the potential crimes Mueller's team is investigating would have occurred in the District, such as allegations that Trump aides or advisers made false statements in disclosure records or lied to federal agents.
Brent crude futures slipped 0.4 percent to $52.17 per barrel, still not far from Wednesday's high of $52.93, its highest level in 10 weeks.
"It's a significant escalation of the process", national security attorney Bradley Moss told AFP. We've expected this frankly because you usually get a grand jury because you need it for information.
And I don't care if your client is Mother Teresa telling the absolute truth.
A White House adviser said the president and his son-in-law, Jared Kushner, had not received subpoenas, nor had the White House. Cobb told the AP that the White House "favors anything that accelerates the conclusion of his work fairly". The Post has previously reported that Mueller is investigating whether the president tried to obstruct justice leading up to his firing of Comey.
Mueller's reliance on a grand jury is the "logical next step in this investigation" given that it's the traditional method for prosecutors to gather evidence, said Washington defense lawyer Jacob Frenkel.
A report by private payrolls processor ADP showed on Wednesday that private U.S. employers added 178,000 jobs in July, slightly below economists' expectations, although payroll gains in June were revised up to 191,000 from an originally reported 158,000.
Meanwhile, lawyers for President Donald Trump said they were unaware of the existence of a grand jury and had no information to suggest the president himself was under federal investigation. At least eight members of Mueller's team have associations with the Democratic Party or have a track record of making donations to Democratic candidates, including the presidential campaigns of Obama and Clinton. Then president Bill Clinton was forced to give details about his relationship with Monica Lewinsky, evidence that was used in his impeachment.
The euro traded at $1.1845, after having risen to as high as $1.19105 on Wednesday, its highest level since January 2015.
The legislation, sponsored by Democrat Chris Coons and Republican Thom Tillis, would bar a president from directly firing the special counsel without a judicial review.
Under the bill, Mueller would be allowed to challenge his removal in court in the event he is fired without good cause.