Yes, and it was terrible, but what are we to take away from that? The FBI can never investigate anyone again? Should all FBI cases be tossed out because a few officers abused the system and the courts didn't do what they were supposed to? Or does just Trump get this immunity?
You do realize that the investigation looking at Trump's tax returns are not an FBI investigation right? So what then? No one can investigate Trump ever again?
When we (conservatives) rightly are scared of too much government power, why do we toss out that concern when it comes to Trump?
Your hyperbole is boring.
The thing that needs to happen is the FISA warrant system needs to be extremely restricted or completely abolished, which BTW was created out of the Patriot Act to investigate TERRORISM -- not election interference.
When the federal agencies under the Executive Office are weaponized against a political enemy/outsider, it doesn't matter what agency has jurisdiction. The IRS, by the way, doesn't do tax fraud investigations. That falls under the US Dept of the Treasury.
When Capone was charged with tax evasion, it was a CRIMINAL charge made by the Treasury Dept. When Capone lied in court, he was arrested as he tried to leave the courthouse by the FBI -- for criminal contempt of court. He was convicted and sentenced to less than a year in prison plus all kinds of fines and court costs as well as back taxes and penalties.
The laws may reside on one side of the organizational fence or the other, but these cases often cross those boundaries when the government wants/needs them to.