Compressed Air Cooler

Since expanding gas cools, could that be used to cool a normal cooler?
It could either have a build-in air tank or accept air cartridges.
Advantages:

• It could use a thermostat to maintain a constant temperature.
• No water mess.
• Not excessively cold like dry ice.
• If it had a tank it could be recharged at most gas stations.
• The "charge" would remain good for quite a while when not used.
  

Disadvantages:

• After refilling the tank it would have to sit for a while to cool off.
• The tank may have to be too heavy or bulky to be useful (Does anyone know the numbers to do the math for this?)

What do you think?

Candidates or Issues

It seems most political campaigns focus on the candidates instead of the issues. Why are the candidates sold instead of the issues? Why don't the campaigns say "... is the way to handle issue ... because ... and candidate ... is the best person to achieve that" instead of "Vote for candidate ..., he supports ..., .., and ..." If you sell the issues then during the next election you can build off of the last election by expounding on the right way to handle issues and still mention which candidate will best achieve those results. Each election could build off of the previous election better and the voting population would be better informed.

I have the opportunity to vote in a primary election next Tuesday. If you have a similiar opportunity to vote then I urge you take take the oppotunity!