I'm largely offline for a spot. However, you might want to have a glance at this item at the Forward. It's a list of 10 rising Jewish-American politicians to watch in the November elections. A majority of them say their motivation is Tikkun Olam. Now as I've said repeatedly in the past, Tikkun Olam in Jewish tradition didn't mostly mean what these folks think it means; theirs is largely am American sentiment dressed up to look like a traditional Jewish tradition.
I'm not saying it isn't a fine sentiment, the wish to fix the world, and it does, of course, have Jewish roots; still, it's interesting, this direction American Jewry seems to be taking.