Talk about a tall order. A Congress that can agree on little has 12 scheduled work days to forge a compromise on one of the most volatile issues -- immigration -- before going home for all of August.

Failure to find agreement in the next three weeks means no immediate help for a U.S. immigration system overwhelmed by tens of thousands of children from Central America illegally entering the country in recent months.

Republicans and Democrats are refining their opening positions this week as officials scramble to keep up with the unprecedented influx amid the hyperpartisan political climate of a congressional election year.

Both sides appear supportive of spending more money. The sticking points involve how much to spend on what, as well as the broader policy issue of who gets deported and how fast.

What's happened so far

Facing chronic violence at home and motivated by the belief they won't get sent back by the United States, an unprecedented surge of unaccompanied minors from Honduras, Guatemala and El Salvador continues traveling through Mexico to cross the border into Texas.

Administration officials told a congressional hearing last week that almost 60,000 arrived since October 1, with up to 30,000 more expected by the end of the current fiscal year on September 30 -- well over twice the figure of the previous year.

They face an immigration limbo of overcrowded holding centers, followed by transfer or release to await deportation hearings that can take months or years to happen and many don't attend.

President Barack Obama last week requested $3.7 billion in emergency funding from Congress to respond to what his administration calls an urgent humanitarian situation.

The request includes $1.8 billion to provide temporary care for children while they are in government custody, and $1.6 billion to bolster customs and border efforts while cracking down on smugglers.

Another $300 million would help Mexico and the Central American governments discourage desperate parents from paying smugglers to get their children into the United States.

Also, the Department of Homeland Security announced Monday it had sent about 40 recent arrivals including adults and children back to their home country of Honduras. It said more deportations to the three Central American nations were expected soon.

Republicans contend Obama created the problem by halting deportations of some child immigrants in recent years, a move they say invited more to come. They want any additional resources now to bolster border security and swiftly send back the new arrivals.

Democrats argue that additional resources should speed up the processing of the child immigrants, with faster hearings to determine if they have the right to stay and quicker deportations if a judge issues a removal order.

Meanwhile, the divisive issue plays out on streets in some affected areas, with protesters in one California town blocking buses transporting new arrivals to temporary facilities.

The House

A Republican working group appointed by House Speaker John Boehner to come up with recommendations for legislation reports back Tuesday, with its findings expected to outline the GOP negotiating stance.

Boehner already is under pressure from Obama and Democrats to bring up a broad Senate-passed immigration reform measure that would boost border security while providing a path to legal status for millions of longtime undocumented immigrants in the country.

Conservatives oppose the Senate plan as an amnesty, knowing it would add millions of likely Democratic voters to election rolls.

However, moderate Republicans fear continued GOP resistance to immigration reform supported by a broad coalition of business, faith and social leaders undermines the party's chances to increase its popularity with Hispanic Americans -- the nation's largest minority and an increasingly crucial election demographic.

Boehner and other Republican leaders may consider the current border crisis an opportunity to show their willingness to agree on a narrow immigration measure while avoiding the sweep of comprehensive reforms pushed by Obama and Democrats in the Senate proposal.

The 2008 trafficking law

Republicans and some Democrats appear focused on changing a 2008 law designed to crack down on child trafficking.

The William Wilberforce Trafficking Victims Protection Action Act requires deportation hearings for child immigrants who show up at the border from all countries except for U.S. neighbors Mexico and Canada.

It distinguished between neighboring and non-bordering countries because Mexicans or Canadians turned back at the border are in their home country, unlike those from Central American nations and elsewhere.