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Photo: Joe Raedle/Getty Images.

Former Vice President Joe Biden has earned endorsements from a string of prominent Democrats in the hours leading up to Super Tuesday, where wins in huge delegate states like California and Texas could drastically change the trajectory of the 2020 race.

Driving the news: Two former Obama administration officials — former UN Ambassador Samantha Power and former White House chief of staff Denis McDonough — endorsed Biden on Tuesday.

But they're not the only big names throwing their weight behind Biden's campaign, which has seen a turnaround after a sweeping victory in South Carolina overshadowed his poor performances in Iowa and New Hampshire. Other political figures endorsing Biden on Monday and Tuesday include:

  • Pete Buttigieg
  • Amy Klobuchar
  • Beto O'Rourke
  • Former Senate Minority Leader Harry Reid
  • Former UN ambassador and Obama national security adviser Susan Rice
  • Illinois Sen. Tammy Duckworth
  • California Rep. Gil Cisneros
  • Texas Rep. Veronica Escobar
  • Ohio Rep. Marcia Fudge
  • Former Colorado Sen. Mark Udall
  • Austin Mayor Steve Adler
  • Virginia House Majority Leader Charniele Herring
  • Denver Mayor Michael Hancock
  • Chattanooga Mayor Andy Berke
  • Florida Rep. Debbie Wasserman Schultz

The big picture: Moderates are coalescing around Biden in a bid to stop progressive Sen. Bernie Sanders, who could run away with an insurmountable delegate lead after Super Tuesday. Mike Bloomberg, a centrist who will appear on the ballot for the first time on Tuesday, doesn't yet appear to be budging.

Go deeper

Fringe right plots new attacks out of sight

Illustration: Aïda Amer/Axios

Domestic extremists are using obscure and private corners of the internet to plot new attacks ahead of Inauguration Day. Their plans are also hidden in plain sight, buried in podcasts and online video platforms.

Why it matters: Because law enforcement was caught flat-footed during last week's Capitol siege, researchers and intelligence agencies are paying more attention to online threats that could turn into real-world violence.

Kids’ screen time up 50% during pandemic

Illustration: Sarah Grillo/Axios

When the coronavirus lockdowns started in March, kidstech firm SuperAwesome found that screen time was up 50%. Nearly a year later, that percentage hasn't budged, according to new figures from the firm.

Why it matters: For most parents, pre-pandemic expectations around screen time are no longer realistic. The concern now has shifted from the number of hours in front of screens to the quality of screen time.

In photos: D.C. and U.S. states on alert for pre-inauguration violence

National Guard troops stand behind security fencing with the dome of the U.S. Capitol Building behind them, on Jan. 16. Photo: Kent Nishimura / Los Angeles Times via Getty Images

Security has been stepped up in Washington, D.C., and state capitols across the U.S. as authorities brace for potential violence this weekend.

Driving the news: Following the Jan. 6 insurrection at the U.S. Capitol by some supporters of President Trump, the FBI has said there could be armed protests in D.C. and in all 50 state capitols in the run-up to President-elect Joe Biden's inauguration Wednesday.