>>I'm an American, and TPP has only a marginal impact on US public policy,

That is very short sighted, I'm am an American as well and feel TPP will have long and far reaching impact on Public Policy, While it ratification would only marginaly if at all change any policy currently in place, it will make any reforms to public policy impossible

It would forever ratify the terrible copyright and patent system preventing any reforms to them, that alone I believe should be classified as a major impact on public policy