After taking office, the newly elected President Donald Trump formally withdrew the United States from TPP in January 2017, therefore the TPP could not be ratified as required and did not enter into force.
This is how Obama tried to have the trade agreement enacted:
Obama to attend TPP Summit, hold Talks with Xi and Turnbull during next APEC in Lima, Peru (bibliotecapleyades.net)
Obama to Expand Modern-Day Slave Trade with TPP (bibliotecapleyades.net)
Obama’s Pacific Trade Deal TPP ‘Worst Ever’ Attack on Public Health – Leaked Draft Shows (bibliotecapleyades.net)
Obama’s Corporate Agenda Delayed as TPP Misses Deadline (bibliotecapleyades.net)
Obama’s TTIP Trade Deal with Europe Would Be Disastrous for Europe – Says the First Independent Study (bibliotecapleyades.net)
Secret Trade Agreements Threaten to Undo Our Last Shreds of Food Safety – The TPP (bibliotecapleyades.net)
The TPP – Obama’s Secret Treaty Would Be the Most Important Step Toward a One World Economic System (bibliotecapleyades.net)
The Trade Deal Scam – TPP and EU-US Free Trade Agreement (bibliotecapleyades.net)
With TPP ‘At Heart’ of Obama Agenda, Critics Debunk Trade Talking Points (bibliotecapleyades.net)
Why Do a Majority of Americans Oppose Fast-tracking the TPP? (bibliotecapleyades.net)