Nine of the House’s most moderate Democrats are warning President Donald Trump that he’s becoming impossible to work with.

Ahead of the president’s address to a joint session of Congress Tuesday night, leading members of the New Democrat Coalition sent a letter to Trump saying his “acrimonious approach” and “inflammatory rhetoric” were making it more difficult to compromise.

The letter notes that there are multiple policy realms where the New Democrats would theoretically be quite eager to work with Trump, including tax reform, an infrastructure bill, and even improving Obamacare. The letter also makes clear that these Democrats are among the most eager to work with Republicans: “As a group with a track record of seeking bipartisan cooperation, we implore you to begin focusing on these issues,” it says.

But it also highlights that Trump is losing the potential to win Democratic votes on bills that might otherwise reach bipartisan political victory. As the caucus’s chair, Rep. Jim Himes (D-CT), argued in an interview with Vox on February 6: "You can work with a quirky, untrained, market-oriented president. … You can't work with a president who is eroding the Constitution. The real problem is if we have a lot more weeks that shock Americans, it's going to close the window for having those technocratic discussions we should be having."

Here’s the full text of the letter: