Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) hit President Trump for his decision to fire FBI Director James Comey on Tuesday, calling on Congress to "get their heads out of the sand" and use a special prosecutor to investigate Trump.

Trump made the bombshell firing on Tuesday afternoon based on the recommendation of Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE and his deputy, Rod Rosenstein, according to White House press secretary Sean Spicer.

Trump argued in a letter to Comey that the FBI needs a new leader so it can restore "pubic trust and confidence."

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Warren responded to the news, saying, "we need a real, independent prosecutor who [Trump] can't fire, Sessions can't intimidate and Congress can't muzzle."

There’s no question that Comey made questionable decisions during the election. The FBI shouldn’t comment on ongoing investigations. — Elizabeth Warren (@SenWarren) May 9, 2017

But does anyone seriously believe @realDonaldTrump fired the top person investigating his ties to Russia because he was unfair to Hillary? — Elizabeth Warren (@SenWarren) May 9, 2017

It’s time for Congress to get their heads out of the sand. @realDonaldTrump cannot pick the person to continue this critical investigation. — Elizabeth Warren (@SenWarren) May 9, 2017

We need a real, independent prosecutor who @realDonaldTrump can't fire, Sessions can't intimidate, & Congress can't muzzle. We need it now. — Elizabeth Warren (@SenWarren) May 9, 2017

Hillary Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE used a private email server as secretary of State and was investigated over her handling of classified information by the FBI under Comey, who announced last July that he would not recommend any charges be brought against the then-Democratic presidential nominee.

The FBI is now investigating possible ties between Trump's campaign and Russia, which the intelligence community concluded had meddled in the presidential election to help Trump win.