A key role of a political party that is out of power is to

Act as a "watchdog" over the party in power.

Explanation:

A key role of a political party that is out of power is to "Act as a "watchdog" over the party in power."

To act as a watchdog is to keep the party in power on their toes constantly. Thereby making the party in power more accountable and quickly see their lapses.

Also, when a party out of power acts as a watchdog, it helps them seek more support against the party in power.

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free points always

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.