A coalition of liberal groups urged Democrats to reject a proposal to reopen the government Monday, calling on them to “stand strong” and insist that a spending deal include an array of demands, rather than a promise to address issues like immigration at a later date.

Senators are scheduled to vote at noon Monday on a three-week continuing resolution that includes a six-year extension of the Children’s Health Insurance Program, but not protections for undocumented immigrants brought to the country as children. Senate Majority Leader Mitch McConnell made a commitment Sunday night that he would take up immigration legislation if there is no action by the end of those three weeks on Feb. 8.

But liberals aren’t buying it, and they’re urging Senate Democrats to reject the proposal.

“We heard this record before,” said Vanita Gupta, president of the Leadership Conference on Civil and Human Rights. “This is not a credible offer to solve this crisis. Thousands of dreamers will be at risk by Feb. 8”

Gupta joined the leaders of 10 other liberal outside groups and immigration advocates, including Planned Parenthood Action Fund, Indivisible, MoveOn.org, United We Dream, and the Service Employees International Union.