This is a very important rule that facilitates the separation of the three powers: executive, legislature, and judiciary. The idea is that if one institution o

This is a very important rule that facilitates the separation of the three powers: executive, legislature, and judiciary. The idea is that if one institution or person has any two of these power it can "take over the country". Executive and judiciary: Enforce your own court orders. Executive and legislature: Enforce your own laws. Legislature and judiciary: Enforce your own laws (through the courts this time). That is why members of congress cannot be arrested. That is actually the same in most democracies. Ultimately this does not apply here, though, as (1) congress can remove other member from congress and (2) prosecution and arrest can start as soon as the person is no longer member of congress. Edit: Spelling