Donald Trump’s promise Tuesday to appoint a special prosecutor to investigate the Clinton Foundation makes one thing clear: Hillary Clinton may be going either to the White House or the Big House.

Trump is suggesting that he will take charges of criminal wrongdoing by Clinton very seriously, unlike, of course, the Obama administration.

It’s not just the Clinton Foundation and possible influence peddling at the State Department that is ripe for investigation. Trump can easily revisit FBI Director Comey’s decision not to prosecute Clinton over her mishandling of classified information by using a private email server. Her attempts to cover her tracks could prompt charges of a coverup and obstruction of justice.

And congressional Republicans are already looking into whether she committed perjury before Congress. Obviously, she lied to Congress. Whether it ranks as “perjury” is surely something a Trump attorney general could look into.

And that attorney general may well be Chris Christie, a political animal who would have few qualms about going after Clinton.

Meantime, senior Clinton aides who had frequent contact with the Clinton Foundation while they worked at the State Department could also face prosecution under Trump.

On the downside, I’d note, we could start to look like a Banana Republic. Politicians prosecuting their political opponents is not something that normally happens in America.

But Hillary Clinton is not something that normally happens in America. Her potential crimes are so rampant and egregious, we may have little choice but to indict her if we want to uphold the principle that nobody is above the law.