23-year-old Juan Vega is escorted into the ICE downtown staging facility in Los Angeles. Photo: Brian van der Brug / Los Angeles Times via Getty Images

U.S. immigration officials are preparing for the "biggest enforcement action of its kind under President Trump," in which more than 1,500 undocumented immigrants could be arrested in the Bay Area, per the San Francisco Chronicle.

Why it matters: The Chronicle reports that this is meant to send a message "that immigration policy will be enforced in the sanctuary state." It's expected to focus on those previously identified as "targets for deportation," but could include others that agents come across during the operation.

  • Per the Chronicle, immigration officers from around the country are expected to be "flown in" to assist.
  • Go deeper: A California judge ruled against Trump's sanctuary city executive order in November.

Go deeper

Amy Harder, author of Generate
3 hours ago - Energy & Environment

Climate change goes mainstream in presidential debate

Photo illustration: Aïda Amer/Axios. Photo: Olivier Douliery-Pool/Getty

The most notable part of Thursday’s presidential debate on climate change was the fact it was included as a topic and assumed as a fact.

The big picture: This is the first time in U.S. presidential history that climate change was a featured issue at a debate. It signals how the problem has become part of the fabric of our society. More extreme weather, like the wildfires ravaging Colorado, is pushing the topic to the front-burner.

Finally, a real debate

Photo: Morry Gash/AP

A more disciplined President Trump held back from the rowdy interruptions at tonight's debate in Nashville, while making some assertions so outlandish that Joe Biden chuckled and even closed his eyes. A Trump campaign adviser told Axios: "He finally listened." 

The result: A real debate.

Biden to Trump: "I have not taken a penny from any foreign source ever in my life"

Former VP Joe Biden pushed back Thursday against allegations from President Trump, saying he had never profited from foreign sources. "Nothing was unethical," Biden told debate moderator Kristen Welker about his son Hunter's work in Ukraine while he was vice president.

Why it matters: Earlier on Thursday, Hunter Biden's former business partner, Tony Bobulinski, released a statement saying Joe Biden's claims that he never discussed overseas business dealings with his son were "false."