What happened 23 December in United States of America

Lincoln emphasized his opposition to Polk by drafting and introducing his Spot Resolutions. The war had begun with a Mexican slaughter of American soldiers in territory disputed by Mexico, and Polk insisted that Mexican soldiers had "invaded our territory and shed the blood of our fellow-citizens on our soil". Lincoln demanded that Polk show Congress the exact spot on which blood had been shed and prove that the spot was on American soil. The resolution was ignored in both Congress and the national papers, and it cost Lincoln political support in his district. One Illinois newspaper derisively nicknamed him "spotty Lincoln". Lincoln later regretted some of his statements, especially his attack on presidential war-making powers.

After her success in Europe and a prominent role in Shanghai Express, Wong's Hollywood career returned to its old pattern. Because of the Hays Code's anti-miscegenation rules, she was passed over for the leading female role in The Son-Daughter in favor of Helen Hayes.

After Armstrong served as backup commander for Apollo 8, Slayton offered him the post of commander of Apollo 11 on December 23, 1968, as Apollo 8 orbited the Moon.

On December 23, 1971, less than five years into his 13-year sentence, Hoffa was released from prison when President Richard Nixon commuted his sentence to time served.

His first major break came from his starring role in director Barry Levinson's Good Morning, Vietnam (1987), which earned Williams a nomination for the Academy Award for Best Actor. The film is set in 1965 during the Vietnam War, with Williams playing the role of Adrian Cronauer, a radio shock jock who keeps the troops entertained with comedy and sarcasm. Williams was allowed to play the role without a script, improvising most of his lines. Over the microphone, he created voice impressions of people, including Walter Cronkite, Gomer Pyle, Elvis Presley, Mr. Ed, and Richard Nixon. "We just let the cameras roll," said producer Mark Johnson, and Williams "managed to create something new for every single take."

On December 23, 2007, Bryant became the youngest player (29 years, 122 days) to reach 20,000 points, in a game against the New York Knicks, in Madison Square Garden, after scoring 39 points to go along with 11 rebounds and 8 assists. This record has since been broken by LeBron James. On March 28, Bryant scored a season-high 53 points to go with 10 rebounds in a loss to the Memphis Grizzlies.

Musk believed the key to making space travel affordable was to make rockets reusable, though space industry experts believed reusable rockets were impossible or infeasible. On December 22, 2015, SpaceX successfully landed the first stage of its Falcon rocket back at the launch pad, the first time this had been achieved by an orbital rocket.