Republican members of Congress hammered four Democratic mayors about their so-called sanctuary city policies, accusing them of endangering Americans and threatening to prosecute local officials.

The fourth-quarter patterns – derived from gaps in affordability, underwater mortgages, foreclosures and unemployment - revealed that two-thirds of the 50 counties around the U.S. considered most exposed to potential fallbacks were in California, Florida, Illinois and the New York City region.

New York Gov. Kathy Hochul says Democratic governors must be a "firewall" against Trump and GOP, but notes there are "not a lot of great options" to resist.