Sen. Jeff Sessions, R-Ala., charged the Obama administration with quietly signing the Trans-Pacific Partnership trade agreement in New Zealand, and said the White House tried to minimize it because it knows the public isn't pleased with the deal.

"A trade deal is a contract, and it must be one that puts American workers' interests first, not the interests of global elites," Sessions said in a statement. "It is little surprise the administration is not showcasing today's signing given its unpopularity with the American people."

Sessions went on to bash his fellow senators for allowing the president to fast-track the deal last June, and voting for it despite not knowing what the massive agreement would include.

Voting for fast track gave Obama the ability to negotiate trade agreements that can only be approved or rejected by Congress, but not amended. The provision is meant to facilitate international negotiations, but conservatives and even many Democrats fear the process leads to agreements that Congress isn't allowed to fix.

A Tufts University study found the TPP will cost nearly 450,000 American jobs in the next nine years.