It’s irrelevant how many emails had classified information.
What’s HIGHLY relevant is the content. If there is evidence of bribery and tax evasion (how can there not be), then all three of them are in deep doo-doo.
If these are technical violations only, no US Presidential candidate will ever be taken down for violating rule #22,736, and I’m not sure that the Justice Department SHOULD be empowered to disrupt an election in that way.
Anyone who has ever handled classified information would think you are an idiot.