Immigration hard-liner Steve King, a Republican congressman from Iowa, tweeted that his office in Washington, D.C., is being "invaded" by "illegal aliens," ahead of the coming House debate on immigration reform.

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ABC News explains:

King, a long-time immigration hardliner, last week sponsored an effort to cut funding for President Obama's deferred action program, which grants deportation reprieves to DREAMers.

In response, United We Dream, an undocumented youth activist group, organized a protest at the Iowa congressman's office this morning. Two dozen or so demonstrators showed up at King's office to voice their displeasure with him, organizers said. They arrived wearing caps and gowns (photo here) to reinforce their message that they want to pursue higher education and careers in the U.S.