Gemini shippers group joined numerous associations in signing the attached letter supporting the Corker bill (S. 3013), which would require the President to submit to Congress any proposal to raise tariffs in the interest of national security under Section 232 of the Trade Expansion Act of 1962.  More than 270 national associations and state and local chambers of commerce signed onto the letter.

USA Today has an article about the letter which was just posted online.

You can find a copy of the letter here: 180626_Coalition_S3013_Senate