Senate Democrats are infighting on the eve of the release of Senate Budget Committee Chairwoman Patty Murray’s budget, Breitbart News has exclusively learned.

Sen. Max Baucus (D-MT), the Chairman of the Senate Finance Committee, slammed Murray on Tuesday evening through a spokesperson. A Baucus spokesperson told Breitbart News that the Montana Democrat believes Murray’s decision to include what The Hill’s Erik Wasson describes as “reconciliation instructions on tax reform, a move that could allow the budget, which cannot be filibustered in the Senate, to become the legislative vehicle for a tax reform bill,” will be catastrophic for tax reform efforts.

“He [Baucus] does not think the budget reconciliation process works from a policy perspective when it comes to comprehensive tax reform,” a Baucus spokesperson told Breitbart News. “Every provision needs to have a score and reconciliation would kill the possibility of doing any tax code simplification.”

Nonetheless, Murray is supposedly moving forward with that idea, as Politico has confirmed.

A spokesperson for Murray has not responded to Breitbart News’s request for comment in response to Baucus’s spokesperson's comments.