I'm not Constitutional Scholar, but...

There are just a few things that I don't understand about our government. If I go back to my civics lessons in school I remember 3 branches of government. I'm just going to talk out loud to myself here, see if writing this out makes more sense. Perhaps someone has the same questions I do and hope they can get answered.

Judicial - This branch is in place to interpret the laws already in place.
Executive - This branch is in place to enforce the laws that are already in place.
Legislative - This branch is in place to create the laws that the Executive and Judicial branches draw power from.

I wonder if I need to join some sort of Constitutional political party. Maybe I just need to reread it to be sure I know what it says. Goodness, who knows if there was some sneaky amendment added to it in this most recent "stimulus" bill. But states have to ratify amendments.... You know what - I'm going to read the Constitution again. (http://www.house.gov/house/Constitution/Constitution.html) Ironic that the House has the Constitution on it's website.

Anyways, something that has got me is why does Congress always do these 'congressional investigations'? The 9/11 commission, the MLB steroid deal, Jack Bauer from 24 just to name a few. If there was to be an investigation shouldn't the Justice Dept. be doing this? Can Congress prosecute someone? Not to mention, don't we have a lot of other pressing matters to attend to besides making sure no baseball players are taking drugs?! Is that really the job of Congress? The media has a better responsibility for this.

I don' t get it, just trying to make sense