Impeachment is not required in order to allow prosecuting a president, and even Chief Justice’s majority opinion which granted presidents significant immunity explicitly rejected the idea that impeachment is such a prerequisite.
Impeachment is only a prerequisite to the Senate possibly convicting in the political rather than criminal trial and removing the person from office, and then possibly disqualifying them from future federal office. It has no bearing on whatever criminal procedures are not blocked by immunity.
Impeachment is only a prerequisite to the Senate possibly convicting in the political rather than criminal trial and removing the person from office, and then possibly disqualifying them from future federal office. It has no bearing on whatever criminal procedures are not blocked by immunity.