American big business has now officially endorsed the Trans-Pacific Partnership (TPP), giving many all the proof they need that the 12-nation deal—poised to be the largest ever—is bad news for people and the planet.

An association of Chief Executive Officers known as the Business Roundtable (BRT) announced its formal backing on Tuesday, indicating that it plans to use its muscle to press Congress to approve the deal this year. In fact, BRT president John Engler told The Hill that the association wants the TPP to pass as quickly as possible—before the summer.

That endorsement followed Monday’s announcement from the National Association of Manufacturers (NAM) that it is throwing its weight behind the pact. “Open markets encourage cooperation and prosperity among nations and governments, rather than conflict, and the NAM has a long and proud history of promoting free and fair trade,” said NAM President and CEO Jay Timmons.

With these two endorsements now established, some predict that the powerful U.S. Chamber of Commerce will be next.

To be sure, multinational corporations have already been heavily influential in the TPP negotiations, which have been conducted in near complete secrecy.