Tell me all about how the Legal System in the USA makes sense?

These countries DO NOT allow convicted felons to enter, as visitors, but apparently you RUN for the highest office in one particular country, and that's ok.

List of Countries You Can’t Travel to With a Criminal Record
Here is a list of countries that don’t allow convicted felons to enter:

China
Cuba
India
Iran
Israel
Japan
Kenya
Macau
New Zealand
South Africa
Taiwan
United Kingdom
United States

Tell me all about how the Legal System in the USA makes sense?
Post Opinion