I keep reading that she is against it now, and that's clearly not what she's said.
I think most people really haven't read it but have read articles like Warren's attacking the ISDS and continue the silly arguments that it was done in "secret", who cares, and why? We see the results an can debate those.
Also I keep reading that the US government is trying to hide the agreement from the public it by not posting it. Yet it's been online for a long, long time.
ISDS info
https://ustr.gov/about-us/policy-offices/press-office/fact-sheets/2015/march/investor-state-dispute-settlement-isds
TPP full text
https://ustr.gov/trade-agreements/free-trade-agreements/trans-pacific-partnership/tpp-full-text
The truth is that TPP is a complicated agreement, it is impossible to know whether costs will exceed benefits until we have data after implementation. Undoubtedly,some jobs will be lost, but some will be created as well. In general, trade agreements have increased wealth particularly in poorer nations. In fact, trade agreements show no correlation with living standard declines. NAFTA preceded substantial gains in US median income, though the TPP is not expected to deliver a huge amount to the US' economic growth, there is no reason to believe the TPP will be any different than previous agreements...and there are strategic considerations as well. For instance, it is in the our best interest to get China on board where trade practices are concerned. They are in the midst of an economic decline and have expressed interest in the agreement which would definitely help labor internationally by creating a minimum wage floor, better working conditions, and addressing child labor abuses.
We don't know if the TPP can accomplish this goal, but imo it is better than doing nothing and giving power only to International corporations to create and dictate terms.