Ken Starr’s investigation was started because there was evidence of a crime.
The massive fraud in the White Water financing scam.
When the Lewinski mess arose Janet Reno dumped in on the SC at the time for White Water, Ken Starr.
However the President was never charged in a crime related to White Water. And if a crime was committed, it was probably the first lady, not the President. Evidence Bill committed a crime related to White Water was at best flimsy and at worst no worse than Trump’s situation.