From the editorial board of the New York Times:
The American people — not to mention the credibility of the world’s oldest democracy — require a thorough, impartial investigation into the extent of Russia’s meddling with the 2016 presidential election on behalf of Donald Trump and, crucially, whether high-ranking members of Mr. Trump’s campaign colluded in that effort.
By firing the F.B.I. director, James Comey, late Tuesday afternoon, President Trump has cast grave doubt on the viability of any further investigation into what could be one of the biggest political scandals in the country’s history.
The explanation for this shocking move — that Mr. Comey’s bungling of the investigation into Hillary Clinton’s private email server violated longstanding Justice Department policy and profoundly damaged public trust in the agency — is impossible to take at face value. Certainly Mr. Comey deserves all the criticism heaped upon him for his repeated missteps in that case, but just as certainly, that’s not the reason Mr. Trump fired him.
The obvious historical parallel to Mr. Trump’s action was the so-called Saturday Night Massacre in October 1973, when President Richard Nixon ordered the firing of the special prosecutor investigating Watergate, prompting the principled resignations of the attorney general and his deputy. But now, there is no special prosecutor in place to determine whether the public trust has been violated, and whether the presidency was effectively stolen by a hostile foreign power. For that reason, the country has reached an even more perilous moment.