Casa de Maryland/Casa of Maryland is a far-left, publicly-funded group that strongly supports illegal immigration and which is now linked into the Barack Obama administration; their former president and current board member Thomas Perez was originally considered to head the USCIS and now serves as the head of the Department of Justice's Civil Rights Division.
Casa's protectors include the Washington Post (link) and the local Democratic Party infrastructure. They also receive funding from Citgo, which equates to them receiving money from the government of Venezuela. There's more on their funding here. Casa is a member of the National Capital Immigration Coalition; at least two other groups linked to the Mexican government are part of that Coalition. A frequent quote source for the MSM is Kim Propeack, their "Director of Community Organizing and Action Department". She's also apparently a lawyer.
Casa of Maryland operates centers for day laborers, even going as far as advertising on Craigslist. They claim that a "majority" of those using their centers are here legally, but also claimed that HR4437 would force them to close those centers. Note that a UCLA study showed that 75% of day laborers are illegal aliens.
They oppose immigration enforcement. They developed and distributed a guide for illegal aliens. They wanted job training for illegal aliens. They helped illegal aliens get driver's licenses; see also this. They opposed an effort in Maryland to determine the cost of illegal immigration to that state, and they opposed an effort to purge illegal aliens from the voting rolls.
Their executive director Gustavo Torres refused to say the pledge of allegiance in 2006. In 2007, he spoke at a "revolution in the U.S." conference in Venezuala. That's not all. See a quote here, and in 2006, he said this:
"We are going to target [the Minuteman Project members] in a specific way... [by taking their own pictures]... Then we are going to picket their houses, and the schools of their kids, and go to their work... If they are going to do this to us, we are going to respond in the same way, to let people know their neighbors are extremists, that they are anti-immigrant. They are going to hear from us."