The TPP can't be "pending in Congress" while "the Obama Administration still refuses to make the TPP a public document".  It can't be both.  The article you quoted is old news from July, 2015.  The full TPP has been posted at https://www.whitehouse.gov/blog/2015/11/05/path-forward-trans-pacific-partnership and https://ustr.gov/tpp/.  There are also more recent news articles stating that the President is not expected to submit the TPP to Congress for quite a while, and Senate Majority Leader McConnell has said the earliest the Senate would consider it, once submitted, would be in November after the elections (if then).