When President Trump publicly demanded that the Justice Department open an investigation into the F.B.I.’s scrutiny of his campaign contacts with Russia, he crossed over a well-established bright line norm of constraint on executive power: The White House does not make decisions about individual law enforcement investigations. The independence of the Department of Justice is to be respected and preserved.
This is especially true when the president himself is the subject of a criminal investigation, or he would abuse the Department of Justice and use it as a weapon against his political opponents. This is what authoritarian despots do in a dictatorship or a banana republic.
This is precisely where the authoritarian Donald Trump and his Republican enablers in Congress are taking this country. They are engaged in the destruction of our long-cherished democratic institutions and norms, and the rule of law.
Charlie Savage writes at the New York Times, By Demanding an Investigation, Trump Challenged a Constraint on His Power:
“It’s an incredible historical moment,” said Rebecca Roiphe, a professor at New York Law School who helped write a coming scholarly article on the limits of presidential control over the Justice Department. Mr. Trump’s move, she said, “is the culmination of a lot of moments in which he has chipped away at prosecutorial independence, but this is a direct assault.”
Almost since he took office, Mr. Trump has battered the Justice Department’s independence indirectly — lamenting its failure to reopen a criminal investigation of Hillary Clinton that found no wrongdoing, and openly complaining that Attorney General Jeff Sessions recused himself from the Russia inquiry. But he had also acknowledged that as president, “I am not supposed to be involved with the Justice Department,” as he told a radio interviewer with frustration last fall.