Wrong.
It is easy and wrong for the FBI, DOJ, to prosecute people when there is no victim and no one was harmed.
It is easy to give examples that do show partisan manipulation that was illegal.
Like when Bill Clinton was set up in the Paula Jones trial, and asked about personal sexual activities that had nothing to do with Paula Jones.
Those prosecuting Clinton were just trying to illegally attack his personal life.
With Trump's associates, Manafort was the only one who actually committed a tiny crime, by accepting Russian money. Cohen actually did nothing illegal at all by paying Stormy Daniels. Flynn just did not admit to perfectly legal meetings with Russians over the desire to convince Russia not to retaliate against the illegal economic sanctions Obama imposed, and he had a right to privacy over that. Stone did nothing remotely wrong. George Papadopoulos did nothing remotely wrong.
Of course it was and can be illegal to target Trump associates.
Its called selective prosecution, things which everyone does and are not illegal actually.