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Joe Biden. Screenshot: His announcement video

Joseph Robinette Biden is running for president for the 3rd time in 4 decades, with an announcement video focused on President Trump's response to the racist march in Charlottesville.

What they're saying: "Biden’s sister and longtime political confidante, Valerie Biden Owens, described Trump’s comments as a 'blow' to the man who had served as the No. 2 to America’s first black president," the AP reports.

  • “'It really started percolating, and the essence of this was Charlottesville,' Biden Owens said. 'I can tell you that was a major motivating moment for my brother, and the entire family.'”
  • Watch the video.

Why it matters: Absent a big surprise, the Democratic field is now set, with neither of the two early frontrunners bowing out.

Your cheat sheet on Biden launch day:

  • Trump welcomed him with a mean tweet: “Welcome to the race Sleepy Joe. I only hope you have the intelligence, long in doubt, to wage a successful primary campaign."
  • There was no immediate Obama endorsement (Biden claims he asked his former boss not to deliver one.)
  • And Biden hired Bernie's 2016 press secretary, Symone Sanders, to advise the campaign.
  • Biden called "Anita Hill earlier this month to express his regret over 'what she endured' testifying against Justice Clarence Thomas at the 1991 Supreme Court hearings," the NYT reports.
  • "But Ms. Hill ... said she left the conversation feeling deeply unsatisfied and declined to characterize his words to her as an apology."
  • "She said she is not convinced that Mr. Biden truly accepts the harm he caused her and other women who suffered sexual harassment and gender violence."

Chris Christie to Tina Brown: “If Biden can make it through the primaries, he’s the one Dem candidate who appeals to the white working-class voters who handed the election to Trump — and could hand 2020 to Biden instead."

Go deeper

Updated 8 hours ago - World

UK government: Kremlin has plan "to install pro-Russian leadership" in Ukraine

British Foreign Secretary Elizabeth Truss. Photo: Gints Ivuskans / AFP via Getty Images

The United Kingdom's Foreign Secretary on Saturday night said the government has "information that indicates the Russian Government is looking to install a pro-Russian leader in Kyiv as it considers whether to invade and occupy Ukraine."

Driving the news: U.S. National Security Council spokeswoman Emily Horne called the intelligence "deeply concerning" in a statement to Axios. The Biden administration has said Russia is actively manufacturing a pretext for invasion and warned that Putin could use joint military exercises in Belarus as cover to invade from the north.

Updated 10 hours ago - Science

This powerful new accelerator looks for keys to the center of atoms

Illustration: Eniola Odetunde/Axios

Nuclear physicists trying to piece together how atoms are built are about to get a powerful new tool.

Why it matters: When the Facility for Rare Isotope Beams begins experiments later this spring, physicists from around the world will use the particle accelerator to better understand the inner workings of atoms that make up all the matter that can be seen in the universe.

Updated 10 hours ago - Politics & Policy

Omicron dashboard

Illustration: Aïda Amer/Axios

  1. Health: FDA OKs antiviral drug remdesivir for non-hospitalized COVID patients — Walensky: CDC language "pivoting" on "fully vaccinated" — Pfizer and Moderna boosters overwhelmingly prevent Omicron hospitalizations, CDC finds.
  2. Vaccines: The case for Operation Warp Speed 2.0 — Teens and adults missed 37 million vaccinations during COVID — Team USA 100% vaccinated against COVID ahead of Beijing Olympics — Kids' COVID vaccination rates are particularly low in rural America — Annual COVID vaccine preferable to boosters, says Pfizer CEO.
  3. Politics: Arizona governor sues Biden administration over COVID funds tied to mandates — Biden concedes U.S. should have done more testing — Arizona says it "will not be intimidated" by Biden on anti-mask school policies.
  4. World: American Airlines flight to London forced to turn around over mask dispute — WHO: COVID health emergency could end this year — Greece imposes vaccine mandate for people 60 and older — Austria approves COVID vaccine mandate for adults — Beijing officials urge COVID-19 "emergency mode" before Winter Olympics.
  5. Variant tracker