Here' the analogy on the Campaign Finance Law Violations
Think of the Campaign law violations like traffic offences. I'm driving 75 MPH in a 60 MPH zone. I get caught. I receive a ticket and a fine for a minor civil infraction. But, it's still a traffic offence.
Another guy intentionally drives his vehicle into a pedestrian, causing the person serious injury or death. That's a criminal offence and carries jail time. Yet, it's still, technically, a traffic offense.
What the Obama campaign did, and most other campaigns do, is miss deadlines, fail to add up separate campaign contributions at different times from the same person, causing that person to go over the limit and other civil infractions like that. Those infractions are similar to speeding or going through a stop sign, with no accident or injuries. A civil infraction.
What Trump did. Paying out hush money to bury a story just weeks before an election. Doing so knowingly and with criminal intent. Going so far as to create shell companies to hide the transactions. That's similar to paragraph 2 above. That's a felonious, criminal infraction.