If you're that concerned about separation of powers, you'll be concerned that Trump wanted the DOJ to go after his political enemies...
When the Mueller investigation could find no evidence that Trump colluded with Russia the Justice Department decided that it was of upmost importance to find out how the investigation began. They wanted to know why the Obama administration began to spy on those in the Trump campaign.
This was not the first time Obama's Justice Department had spied on their political enemies because that FBI "obtained a sealed search warrant to read a Fox News reporter’s personal emails from two days in 2010 after arguing there was probable cause he had violated espionage laws by soliciting classified information from a government official, court papers show."
That reporter who was spied on was James Rosen of FOX. "The case marks the first time the government has gone to court to portray news gathering as espionage, and Fox News officials and 1st Amendment advocates reacted angrily Monday after the secret warrant was reported by the Washington Post."
https://www.latimes.com/nation/la-xpm-2013-may-20-la-na-fbi-reporter-20130521-story.html
If the Democrats have their way they will take away the 1st amendment as well as the 2nd. The Democrats are the party of lawlessness!
Besides spying on Rosen the the Associated Press revealed that the Department of Justice had secretly spied on AP reporters, obtaining two months' worth of telephone records in what was most likely an attempt to crack down on internal leaks.
According to the AP, the Justice Department acquired records for more than 20 different phone lines associated with the news agency — including reporters' cell, office, and home lines — that could affect more than 100 staffers. Calling the move a "massive and unprecedented intrusion," AP President and Chief Executive Officer Gary Pruitt demanded that the DOJ explain why it had gone after the records.
https://theweek.com/articles/464430/why-did-obama-administration-spy-associated-press
Obama cared nothing about spying on those in the free press because he was intent on attacking any reporter who told the truth about him.
If Hillary would have been elected then she would follow Obama's lead and spy on anyone who reported anything bad about her.
And speaking of Obama's Justice Department, only a fool cannot know why Bill Clinton and Attorney General Loretta Lynch met on the airport tarmac in Phoenix at the time when the Justice Department was investigating crooked Hillary. It wasn't long after that meeting that the charges against Hillary were dropped. No doubt Loretta Lynch was promised a seat on the Supreme Court if she would play ball.
But of course you are ignorant of these facts because you supported Hillary in the 2016 election. In fact, the Democrats depend on ignorant people like you for votes.