That appointment and Democratic pleas for more gave Republicans a fresh political talking point Thursday.
Mr Rosenstein did, however, emphasise to the senators the independent authority that the new special counsel - former FBI director and federal prosecutor Robert Mueller III - has in the Russian investigation. He has been tasked with carrying on the investigation that former FBI Director James Comey told Congress about before he was sacked by President Donald Trump. That system was gravely wounded by Comey's firing, ordered by Trump and overseen by Attorney General Jeff Sessions, who was supposed to have recused himself from the Russian Federation probe but decided it was just fine to recommend the firing of the man overseeing that investigation and choose his replacement. "We didn't really get good answers on that". "But when I made that decision, I actually thought that it would be a bipartisan decision".
In a written statement, Trump insisted anew there were no nefarious ties between his campaign and Russian Federation.
A week ago in this space, we did not call for a special prosecutor, preferring to allow the Senate Intelligence Committee to do this hard work on its own.
Trump's best off letting go of the anger that led him to complain of "the single greatest witch hunt of a politician in American history. I'm fine with anything anybody wants to do, but we have to get back to running this country". "I don't believe it'll have an impact on us at all".
Trump Denies Pressuring Comey to End Flynn Probe
On Wednesday, a special counsel was appointed by the Department of Justice to oversee the investigation. Bush out of pushing ahead the renewal of a controversial surveillance program.
Trump undercut that timeline in an interview last week, but in a news conference on Thursday, he said he relied on Rosenstein's recommendation to make his decision.
Mueller is the man Rosenstein tapped Wednesday to head the U.S. Justice Department's investigation into whether anyone on Trump's campaign colluded with Russian operatives who sought to interfere with the 2016 presidential election.
Mr Rosenstein threatened to resign from the Justice Department because of the explanation that White House officials were giving reporters about the firing, said a person close to the White House, who spoke on the condition of anonymity.
While Trump, with the help of the GOP Congress, has taken some minor steps on deregulation, little progress has been made on taxes, infrastructure or trade.
The comments mirrored a speech by Mr Trump earlier this week, before Mr Mueller's appointment was announced, in which he said no politician in history "has been treated worse or more unfairly". Trump wrote, ignoring impeachment efforts and blistering verbal attacks on previous presidents and other political leaders.
Trump Officially Starts NAFTA Renegotiation Countdown
He discussed "tweaking" parts of the deal in February , and in April, he threatened to scrap it. Lori Wallach, director of Public Citizen's Global Trade Watch, called it "markedly vague".
"With all of the illegal acts that took place in the Clinton campaign & Obama Administration, there was never a special counsel appointed!"
Trump is leaving today for his first foreign trip, to the Mideast and beyond, which aides hope can have the effect of refocusing a White House in disarray. Mr Rosenstein was "unequivocal" that the panel can and should continue its investigation, according to people familiar with his remarks.
"The need for former Director Comey to come testify in public soon is as great as ever", said the Senate's top Democrat, Chuck Schumer of NY.
"It was a counterintelligence investigation before now, it seems to me now to be considered a criminal investigation", Sen.
Mueller, a former federal prosecutor at the Justice Department, was confirmed as FBI director days before the September 11, 2001, attacks that would ultimately shape his tenure. "I am confident he will serve with integrity and professionalism, and will conduct a thorough and fair investigation".
Soldiers, officer injured by assailant at Milan station
Investigators said they are reviewing Hosni's social media interactions to determine if he had extremist contacts. None of the three reported life-threatening injuries, but all three had to be taken to a local hospital.
He was sacked as national security adviser in February after it emerged he had misled Vice President Mike Pence about conversations with Russia's ambassador to Washington in December. It was not clear what caused the mix-up.
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