Progressive Democrats have been hoping to see a showdown between Elizabeth Warren and Hillary Clinton for years. Instead, they’re getting a public feud between the senator from Massachusetts and President Barack Obama.

Obama accused Warren and congressional Democrats on Friday of being “dishonest” and spreading “misinformation” about the Trans-Pacific Partnership — a trade pact the administration is negotiating among 12 nations. The overwhelming majority of Democrats in Congress oppose TPP, while Republican leaders support it.

It was an unusually aggressive attack for the president — accusing members of his own party not of having misplaced priorities, but of actively working to deceive the public. Obama is rarely so severe even with his Republican opponents. Obama said that the Democratic criticism that “gets on [his] nerves the most” is the notion that his TPP pact is “secret,” and went on to insist that the terms of TPP will help American workers.

On Saturday, Warren and Sen. Sherrod Brown (D-Ohio) responded with a letter essentially telling Obama to put up or shut up. If the deal is so great, Warren and Brown wrote, the administration should make the full negotiation texts public before Congress votes on a “fast track” bill that would strip the legislative branch of its authority to amend it.

“Members of Congress should be able to discuss the agreement with our constituents and to participate in a robust public debate, instead of being muzzled by classification rules,” Warren and Brown wrote in the letter obtained by The Huffington Post.

Democrats and some Republican critics have been particularly frustrated by Obama’s decision to treat the TPP documents as classified information, which prevents them from responding to Obama’s claims about the pact in detail.

“Your Administration has deemed the draft text of the agreement classified and kept it hidden from public view, thereby making it a secret deal,” the letter reads. “It is currently illegal for the press, experts, advocates, or the general public to review the text of this agreement. And while you noted that Members of Congress may ‘walk over … and read the text of the agreement’ — as we have done — you neglected to mention that we are prohibited by law from discussing the specifics of that text in public.”

Warren and Brown appeared particularly miffed at being accused of lying.

“We respectfully suggest that characterizing the assessments of labor unions, journalists, Members of Congress, and others who disagree with your approach to transparency on trade issues as ‘dishonest’ is both untrue and unlikely to serve the best interests of the American people,” the letter reads.

Read the full letter here

Read the rest of the article at the Huffington Post