That op-ed was pro on TPA. Cruz has always opposed TPP. TPA has been around since the 70's.
Bull, below is what Cruz wrote about the Trans Pacific Partnership, TPP. Before TPA/TPP became unpopular with conservatives voters.
The United States is making headway on two historic trade agreements, one (TPP) with 11 countries on the Pacific Rim and another with America's friends in Europe. These two agreements alone would mean greater access to a billion customers for American manufacturers, farmers and ranchers.