"This letter serves as a formal disavowal of the organization and its activity," Mark Elias, Warren's attorney wrote in the letter. "The senator has not, and does not, explicitly or implicitly, authorize, endorse, or otherwise approve of the organization's activities."
Later in the letter Elias stresses that "Senator Warren has publicly announced that she is not running for president in 2016."
Ready for Warren is supposed to be an analogous group to Ready for Hillary, which as its name suggests, aims to lay the groundwork for former Secretary of State Hillary Clinton to run for president in 2016.
"We've all been clear since we launched our campaign that Senator Warren isn't associated with our group, and we aren't associated with the Senator -- I don't think there's anything new in this letter," Erica Sagrans, the campaign manager for Ready for Warren, said in a statement to TPM. Sagrans continued:
We completely agree with Senator Warren that maintaining Democratic control of the Senate in 2014 is what we need to focus on this fall. That's why next week we're holding a nationwide day of Ready for Warren house parties, where volunteers will get together in living rooms and coffee shops to talk about how they can support Democratic candidates in 2014 and elevate Senator Warren's agenda.
The group gained attention at the Netroots Nation conference in Detroit in July, but Warren has repeatedly said she is not running for president.
Read the full letter below:
This post was updated.