My response was just saying that some crimes against individuals affect more than just the individual (such as hate crimes which terrorize an entire community). In such cases, sentencing should reflect this.
If anything the sentencing should be highly lenient to reinforce the fact that it's the position of president that's important and not the person currently holding said position. It would be a testament to the stability of the state and it's ability to choose and replace it's leaders.
This is especially true since plenty of people have grievances against their government and as the top leader they should accept the fact that people would want to target them. In that way the laws aren't designed purely to the advantage of those that hold political power.
Reagan was a mouth-breathing moron who could be replaced by pretty much anyone and it wouldn't have compromised the US government in the slightest.