If there is a TPP vote in early 2016, before the general election, labor groups like the AFL-CIO can organize Nov 2016 election campaigns to punish/unseat members of Congress who vote for the TPP. If the TPP vote is moved to the lame duck period between Nov 2016 and Jan 2017, Congress can be re-elected before going on-record with a TPP vote that is opposed by American workers and possibly a majority of voters.
By moving the TPP vote to a lame duck session in Nov 16, the anti-TPP lobbying/campaigning power of American workers in the general election could be neutralized. Sen. Sherrod Brown from the linchpin electoral swing state of Ohio is not a TPP fan, http://www.brown.senate.gov/newsroom/press/release/brown-to-...
"Access to the text has been inadequate throughout the TPP negotiations. A copy of the agreement was not readily available for Members of Congress until we demanded it. And even after the text was deposited in the secure reading rooms in the House and Senate, Members had to ask USTR for TPP annexes and other related documents to be made available. In addition, despite repeated requests, congressional staff with the necessary security clearance are still prohibited from seeing the text on their own."