Peter Welch actually said...

Had you, after your thorough investigation, found evidence that suggested that criminal conduct occurred, is there anything, anything or any...

That's politics, that's not really having anything to do with the independence of prosecutorial discretion.

You had to make a call that was based upon your view of the law, not your view of how it would affect the outcome of who would be the next C...

The prosecutor has really awesome power. The power to prosecute is the power to destroy and it has to be used with restraint.