Hopefully Kerry will be able to work around all these variables.
Meanwhile, there are a number of variables going into the final week, some of which could help Obama.
(The World Bank's statistics on Venezuela are surprisingly patchy, so this limits the number of variables I could look at).
variable var·i·a·ble (vâr'ē-ə-bəl, vār'-)
Likely to change or vary; subject to variation; changeable.
Tending to deviate, as from a normal or recognized type; aberrant.
Having no fixed quantitative value.
Something that varies or that is prone to variation.
A quantity that is capable of assuming any of a set of values.