Sen. Bernie SandersBernard (Bernie) SandersTrump: ‘Clapper has now admitted there was spying on my campaign’ Overnight Defense: Trump decision on Korea summit coming 'next week' | China disinvited from major naval exercise | Senate sends VA reform bill to Trump Senate sends major VA reform bill to Trump's desk MORE (I-Vt.) — perhaps the most liberal member of the Senate — also decried the plan, offering similar complaints.

“As to why I will be voting against this deficit-reduction package when it comes to the floor ... the reason is pretty simple," said Sanders. "This deficit-reduction package is grotesquely unfair and it is also bad economic policy. It should not be passed."

The deal, reached on Sunday, would cut nearly $1 trillion in planned spending over 10 years and create a bicameral committee tasked with identifying another $1.5 trillion in cuts over 10 years to be made in exchange for raising the debt ceiling by $900 billion over the next few months, then by another $1.5 trillion early next year. 

The House is expected to vote on that deal Monday evening, with a Senate vote occurring later in the night or Tuesday morning.