Negotiations on a spending accord needed to avert a government shutdown Friday have nearly collapsed, and Republicans say it’s because House Democrats are pushing for new limits on how many illegal immigrants agents from Immigration and Customs Enforcement can detain this fiscal year, including violent felons.

“Currently there is no cap,” a senior Republican aide close to the negotiations told the Washington Examiner. “They want to put in a cap and have criminals count against it so the number gets smaller and smaller.”