Why Is Trump Allowed To Stand For President?

Ignoring the dozens of personal and financial crimes Trump stands accused of, why is someone with charges hanging over their head, relating to trying overthrow democracy and the potentially treasonous handling of state secret, whilst lobbying for immunity from any crime, allowed to actually stand for President of that democracy? When many of these trials will be resolved after the next election, when he could already be in a position to absolve himself. Doesn't public interest and common sense say he shouldn't be allowed to run?