Details: Tomorrow, Bloomberg will speak at the UN climate conference in Madrid, where he will deliver an update from America’s Pledge, a group (which he co-chairs) that quantifies climate progress of 4,000 cities, states and businesses.

• On Wednesday, Bloomberg will travel to California to announce policies to curtail the region's record wildfires.

From the campaign: "As his first act as president, Mike will send a letter to the UN to re-enter the Paris agreement."

Go deeper:

• Biden skeptical Bloomberg will catch on
• Mike Bloomberg: Bloomberg News employees "just have to learn to live with" 2020 policy
• What Mike Bloomberg's giving says about Mike Bloomberg

• "Here we are on December 7 — the day the president reminds us that Ukraine bombed Pearl Harbor."
• "To me, Chicago is a lot like the White House: Both have a large, vibrant Russian community."

And Emanuel on 2020:

• "I just turned 60. Which is really an awkward age — 30 years too old to be a wunderkind, and 20 years too young to be running for president."
• "You know what Mike Bloomberg calls Tom Steyer and Andrew Yang? The working poor."
• "My old boss President Obama isn’t here. He’s busy with his huge, huge Netflix deal. The problem with Netflix is no one really knows the numbers. They change constantly and never really get revealed. It’s like Medicare for All."

The bottom line: Turning serious, Emanuel concluded: "And even though more than half of the reporters in this room have been on the other end of one of my profanity-laced tirades, I am proud and honored to stand with you on behalf of the free press."

• "And anyone who wants to destroy that precious freedom — well, as we like to say in Chicago, they can go f--- themselves."

Go deeper: Biden says Medicare for All is not where the Democratic Party is

A senior administration official told me how it went down:

• National security adviser Robert O'Brien had worked on the case in his previous job as the State Department's chief hostage negotiator.
• The final flurry happened over the past few weeks after Secretary of State Mike Pompeo learned from the Justice Department that Soleimani was about to be released. Pompeo told Hook: "We may be able to move on this case. Let's reach out and see."
• Iran, convulsed by what the N.Y. Times calls its "worst unrest in 40 years," has faced international condemnation for a crackdown that the U.S. says has killed at last hundreds.
• After the swap, Hook and Wang flew to Ramstein Air Base in Germany. Hook was to return soon. Wang will follow when doctors approve.

Behind the scenes: As soon as the swap happened, administration officials called the families of other Americans held in Iran to share the news, and tell them that they're still working on their cases.

• What they're saying: The official said President Trump has made a huge priority of getting American hostages home, and added that this was done with "no sanctions released, no pallets of cash, no change in policy."

Go deeper: U.S. graduate student released from Iran