Data suggests the nation's racial and ethnic hate groups are heavily concentrated in areas with two key factors: lower incomes and greater diversity.
"They range across a spectrum of being either grudgingly welcome or hostile towards immigrants," she said.
It's some thousand miles from the United States, but Puerto Rico is becoming a 2016 campaign issue.
Being a self-described socialist -- as Sanders is -- is more unpopular for a presidential candidate than being an evangelical Christian, Muslim or atheist.
Hillary Clinton on Tuesday welcomed a hard fought Democratic presidential primary as rival Bernie Sanders continues to draw large crowds and gain on her in the polls.
Christie aides say Democrats' efforts to push him out of office have "zero chance" of being successful.
Clinton argued that Puerto Rico, which faces $72 billion in public debt, should be given the option to file for Chapter 9 bankruptcy.
He took direct aim at Hillary Clinton, framing her as a backward-looking foil to his forward-focused agenda.
Press Secretary Josh Earnest holds the daily briefing.