>>320703
> how is government organized?
We have a presidential system unlike most Euro countries, with 3 branches of power: legislative, executive and judiciary. The federal legislative has a senate (equal representation between each state) and the federal congress (proportional representation). Each branch has an equivalent for each state.
> are there federated states
Yes, they are very well defined in the constitution.
> with their own laws like in the usa?
Yes and no, we have a federal constitution that's very exhaustive (unlike the USA) and a state law can't break the constitution. But state laws indeed exists, also some taxes are made by and go direct to the regional state.
It's compulsory to vote in elections.