@jackcole the key is that a sitting president needs to be impeached and removed from office first if he's so clearly done wrong as to warrant indictment.
And if the people we elect to Congress don't think the guy's done something to warrant removal from office, then it's hard to say we want him indicted.
THAT's why SCOTUS says you can't take such action against a sitting president. It's deference to the democratic process.