The sticking point : The Democrats argue that the agency will be able to increase the number of detention beds from 40,520 to 52,000 as the government wishes and the agency will have the ability to do more to pursue the undocumented immigrants without criminal record. They want to go back to 35,520 by the end of fiscal year 2019.
But Republicans consider the number of detention beds crucial to limit the possibility of detained undocumented immigrants being sent to the US while awaiting hearings.
President Donald Trump is expected to hold a meeting at the Oval Office on Monday afternoon to discuss funding for the Wall and a response to Democrats calling for restrictions on the detention of illegal immigrants. Republican lawmakers are not expected to attend the meeting. Trump Assistant Stephen Miller today held a briefing with insiders from the administration who denounced the demands of the Democrats, according to a source close to the White House.
ICE, the US Department of Homeland Security enforcement agency, has one of its responsibilities to arrest and deport undocumented immigrants resident in the United States. To this end, the agency concludes contracts with district prisons and private companies operating the facilities in which many of the beds are located.
Beds are just that ̵
Not every detention bed is the same. The cost can vary considerably, depending on who is arrested. According to the budget of the ICE for the financial year 2018, the daily price for an adult bed is $ 133.99. Family beds – a bed in a family detention facility that caters to children – cost around $ 319 per day on average.
In a call to reporters on Monday, Deputy ICE Director Matt Albence used any limitation as a security threat. "It will be extremely damaging to the public safety of this country," Albence said. "If we are forced to live within an upper limit based on internal arrests, we will immediately be forced to release criminal aliens currently in custody."
48,000 in custody
Detention facilities are the key to operating ICE: by 1 January, more than 48,000 people were in the ICE prison, surpassing 40,520 beds for grants were provided. The influx of people into ICE custody matches Trump's agenda to prioritize enforcement inside the country, not just at the border.
According to the agency, the majority of people arrested by ICE had criminal convictions (including many traffic offenses) followed by pending criminal charges or previously issued final removal arrangements.
 Trump has repeatedly criticized the practice of releasing undocumented migrants while awaiting their hearings before the Immigration Court, which is often planned after years due to a massive backlog of orders. (This backlog has increased during the recent partial government decommissioning.)
Even with more beds, the administration would be limited in duration, in which it can hold people.
Where the beds are the key for Democrats
The Democrats are trying to limit the number of detention beds to 35,520 for the remainder of the financial year 2019, and the number that can be used to arrest persons who were already in the US at 16,500 in to return to the level of internal detention at the end of the Obama administration.
"An upper limit on ICE prison beds forces the Trump administration to prioritize the deportation of criminals and people who pose real security threats, not unlawful immigrants who contribute to our country," said MEP Lucille Roybal. Allard California, chair of the Homeland Security Subcommittee and member of the Homeland Security Committee of the US Senate.
The National Sheriff's Association and the Major County Sheriff of America condemned the cap in a letter to Nita Lowey, D-New York, and the committee's top Republican, Kay Granger of Texas. Local law enforcement agencies have a legitimate interest in the detention capacity of ICE, as the agency works with county jails nationwide to arrest undocumented migrants.
"Any legislation that reduces ICE's adherence would hamper its ability to perform its national security and public security missions, but also interfere with the ability of local law enforcement agencies to protect the communities they serve," states the letter. "In order to meet the cap tentatively proposed by Congress, the ICE would have to release thousands of foreigners."
Trump is hosting a campaign Monday night in El Paso, Texas.
Kaitlan Collins, Sarah Mucha and Phil Mattingly of CNN contributed to this report.