The wave of children showing up on the U.S. southern border has caught President Barack Obama between his allies who want him to do more on immigration and critics who blame him for causing the sudden surge.

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“Some of the conventional wisdom talks about, oh, the politics of immigration reform seem impossible now,” Obama told donors at a Democratic fundraiser in Weston, Massachusetts on June 11. “I fundamentally reject that.”
 
Biden told the advocates yesterday that “we’re not quitting here. It’s not over,” Jim Wallis, the president and founder of the Christian social justice organization Sojourners, said.