Thursday night, Rosenstein issued an unusual statement complaining about leaks in the case.
Trump reverted to his first justification for firing Comey - the Rosenstein memo.
"The message the President is sending through his tweets is that he believes the rule of law doesn't apply to him and that anyone who thinks otherwise will be fired", Ms Feinstein said.
The move expands the scope of special counsel Robert Mueller's investigation.
The president suggested on Twitter that he may have taped conversations. The attorney general was at a White House meeting when the notification came from Rosenstein, prompting the enraged President to scold the attorney general for the turn of events.
Trump Attorney: Trump Is Not Under Investigation
Vice President Mike Pence has hired a private lawyer to represent his interests in the expanding probe. Meanwhile, another lawyer, Washington veteran John Dowd, has joined the Trump legal team.
Oddly enough, Boente was acting deputy attorney general when Sessions recused himself, and until Rosenstein was appointed.
The president didn't clarify what exactly he was referring to in the early morning tweet, however he has frequently described reports about possible ties between members of his campaign and Russian Federation as a "witch hunt". The first time he told Trump was in his first meeting with the president before the inauguration on January 6. He's been building a team of investigators for a wide-ranging inquiry into Russia's meddling in the 2016 US presidential campaign.
Barak Cohen, a former Justice Department lawyer and now a defense attorney specializing in white-collar crime and investigations, said there was no requirement that the special counsel notify Trump he was under investigation, so the lack of such notice meant nothing. Trump had viewed Sessions' recusal as unnecessary, even though Justice Department regulations made it nearly impossible to avoid. Americans should be skeptical about anonymous allegations. All week, some of Trump's most ardent defenders, including his son Donald Trump Jr., his White House counselor Kellyanne Conway and friend and occasional adviser Newt Gingrich have questioned the probe in similar ways.
The five people spoke on the condition of anonymity because they were not authorized to discuss the matter publicly.
Rosenstein also has authority to fire Mueller, if he finds evidence of good cause.
Trump allies have been questioning whether Mueller can lead an unbiased probe, given that some members of his team have made campaign contributions to Democratic candidates. But Rosenstein, too, may ultimately have to hand off oversight of the probe given his own role in Comey's firing.
Pres. Trump acknowledges he's under investigation
She's the associate attorney general, which makes her third in command at the Justice Department behind Rosenstein and Sessions . Mueller also has expansive powers to investigate any matters that develop from his initial investigation.
FILE - In this June 13, 2013 file photo, then-FBI Director Robert Mueller testifies on Capitol Hill in Washington.
"There has been no notification from the special counsel's office that the president is under investigation".
"Mueller is setting up a dragnet of obstruction, financial questions and every aspect of Trump's life and his associates lives", Gingrich wrote on Twitter, adding "very unsafe".
Trump's fledgling presidency has been battered by allegations - being dissected both by Congress and the Federal Bureau of Investigation - that Russian Federation interfered to sway the 2016 election in his favor, in possible collusion with the former real estate magnate's campaign team.
During his testimony before the same Senate committee last week, Comey said he felt he was sacked in large part because he refused to drop an Federal Bureau of Investigation probe into possible nefarious ties between Russian officials and Trump's campaign adviser and first national-security adviser, Michael Flynn. "So his legal team and the president responds".
Iran and China conduct naval drill in Gulf
Washington has accused Iran of sending fast-attack boats to harass U.S. warships passing through the Strait of Hormuz. US and Iranian warships have had a number of tense encounters in the Persian Gulf in recent years.
Donald Trump's personal lawyer seems to have a peculiar view of what "unconstitutional" means.
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