Gerrymandering
If you mean the "Federal District" yes, it is the political division where Mexico City lies, and it is administered by the federal government. It has the same kind of status as Washington DC has.
A district is a specific area or subdivision, often within a larger region, that is defined for administrative, political, or geographical purposes. It can refer to an area with a distinct identity or function, such as a commercial district or a school district.
Which nations are sovereign Boundaries between governments and their territories
They mean the state boundaries boundaries
A senator elected at large is one elected by the votes of the entire political entity (i.e., state) that he represents. This is opposed to the process of electing Congressmen/women from a district, which is a subdivision of the political entity.
There can be a meaning of two things that I know of: Bhangra and Political boundaries. Those are the three regions of Punjab. Each of them has their own style of Bhangra.
I don't understand what you mean by "district". If you mean the city of Atlanta, it has 420,003. If you mean the Downtown and Midtown, the populations are 30,000 and 28,000. If you mean school district, it has 55,000 students.
Gerrymandering occurs when a congressional district's boundaries are redrawn to give one party a clear advantage over another. In the US, redistricting occurs after the results of the Census are tabulated. Redistricting is currently (2012) occurring in the US. Because in most states a state's legislature gets to decide on the redistricting plan, the party currently in power often attempts to give themselves an advantage in future elections by gerrymandering.
Smach Mean Chey District's population is 29,329.
Sameakki Mean Chey District's population is 57,170.
That depends on what sort of district you mean: Congressional district, state legislative district, school district, etc.
Your draw hand would be the hand that you draw your gun from your holster with.