President of the United States
The President of the United States (often abbreviated "PotUS") is nominally the head of the US government, although his actual powers are supposed to be limited by the US constitution, especially the constitutionally-mandated separation of powers.
During his time in office, George W. Bush made many strides towards increasing the power of the president; it is not clear how these increases will play out in subsequent administrations, giving unusually large significance to the 2008 US presidential race.
- How Good Are Experienced Presidents?: a comparison of a selection of US presidents graphed against their rated performance in office reveals no significant correlation.