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| Jeff Merkley | Sponsor |
| Alejandro Padilla | Co-sponsor |
| Angus King | Co-sponsor |
| Edward Markey | Co-sponsor |
| Elizabeth Warren | Co-sponsor |
| Jeanne Shaheen | Co-sponsor |
| Patty Murray | Co-sponsor |
| Richard Blumenthal | Co-sponsor |
| Ron Wyden | Co-sponsor |
| Susan Collins | Co-sponsor |