What should the US do about the Syrian Civil War?

This poll operates like a wiki: feel free to update its summary and, if applicable, add a new, better option to the poll itself.

Since 2011, Syria has been the theatre of a bloody civil war:
https://en.wikipedia.org/wiki/Syrian_civil_war
A ruthless dictator does not want to leave and make way for a new Syrian democracy (?).
Chemical weapons are reported to have been used.

What should the US do about it, if anything?
Should it intervene militarily? At what conditions? To what extent?

How much do you agree with each of the proposed statements?

listing in manifesto:
http://en.minguo.info/manifesto/foreign_policy
policy wiki:
http://minguo.info/usa/wiki/foreign_policy

Choice Blog entries Score votes Maximum score
80 % The US should only intervene militarily with the approval of the United Nations. 0 8 1 10

Check the 2 blog entries discussing this poll.