You mean indict.
You can only impeach. No other legal course of action has any affect on a President, because well, the President IS THE LAW and is ABOVE the law while in office. Designed by the Founders that way, otherwise Trump would live in a courtroom defending himself from all manner of accusations.
You can only Impeach, this is the remedy. Remove him from office and then he, yes, can be prosecuted, etc.