It will be defeated, they know that, the American people should understand that clearly, Reid said. 

Fifty-three members of the Senate Democratic Conference issued a letter to BoehnerJohn BoehnerLobbyists bounce back under Trump Business groups silent on Trump's Ex-Im nominee Chaffetz won't run for reelection MORE on Wednesday night in which they promised to vote down his debt-ceiling plan if it reaches the Senate. 

The plan cannot pass the upper chamber without Democratic support.

The latest version of Boehner’s plan would cut $917 billion in spending while adding $900 billion to the current $14.3 trillion debt limit.

It also would create a commission charged with finding another $1.8 trillion in savings by Nov. 23, and would require a second debt-limit increase before the 2012 elections. 

A vote on Boehners plan is scheduled for late Thursday afternoon in the House.