Sign up for our daily briefing

Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on the day's biggest business stories

Subscribe to Axios Closer for insights into the day’s business news and trends and why they matter

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios Pro Rata

Dive into the world of dealmakers across VC, PE and M&A with Axios Pro Rata. Delivered daily to your inbox by Dan Primack and Kia Kokalitcheva.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sports news worthy of your time

Binge on the stats and stories that drive the sports world with Axios Sports. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tech news worthy of your time

Get our smart take on technology from the Valley and D.C. with Axios Login. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Get the inside stories

Get an insider's guide to the new White House with Axios Sneak Peek. Sign up for free.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Denver news?

Get a daily digest of the most important stories affecting your hometown with Axios Denver

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Des Moines news?

Get a daily digest of the most important stories affecting your hometown with Axios Des Moines

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Twin Cities news?

Get a daily digest of the most important stories affecting your hometown with Axios Twin Cities

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Tampa Bay news?

Get a daily digest of the most important stories affecting your hometown with Axios Tampa Bay

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Charlotte news?

Get a daily digest of the most important stories affecting your hometown with Axios Charlotte

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Nashville news?

Get a daily digest of the most important stories affecting your hometown with the Axios Nashville newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Columbus news?

Get a daily digest of the most important stories affecting your hometown with the Axios Columbus newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Dallas news?

Get a daily digest of the most important stories affecting your hometown with the Axios Dallas newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Austin news?

Get a daily digest of the most important stories affecting your hometown with the Axios Austin newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Atlanta news?

Get a daily digest of the most important stories affecting your hometown with the Axios Atlanta newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Philadelphia news?

Get a daily digest of the most important stories affecting your hometown with the Axios Philadelphia newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top Chicago news?

Get a daily digest of the most important stories affecting your hometown with the Axios Chicago newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Sign up for Axios NW Arkansas

Stay up-to-date on the most important and interesting stories affecting NW Arkansas, authored by local reporters

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Want a daily digest of the top DC news?

Get a daily digest of the most important stories affecting your hometown with the Axios DC newsletter.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Illustration: Sarah Grillo/Axios

United Airlines and the regional carrier Mesa Air Group this morning announced conditional plans to buy 100 planes each — and an option for more — from the electric plane startup Heart Aerospace.

Driving the news: The two airlines are also investors in a $35 million Series A funding round for the Swedish startup that hopes to bring a 19-seat electric plane into service by 2026.

Other investors include Breakthrough Energy Ventures and Lowercarbon Capital.

Why it matters: Air travel is a significant source of carbon dioxide emissions, and electric, hydrogen and other clean fuel technologies offer the potential to address the problem — if they can be successfully commercialized.

The big picture: "Tuesday’s deal is the latest in a series of bets on new aircraft concepts yet to be tested but that United said could help it reduce carbon emissions," the Wall Street Journal reports.

  • The airline industry is increasingly staking — and announcing preliminary orders — for various kinds of electrified flight.
  • United is backing the vertical takeoff and landing startup Archer, and American Airlines and Virgin Atlantic recently invested in the U.K.-based Vertical Aerospace.

Reality check: These investments and preliminary purchase orders are the early stages of plans to electrify flight, hardly a guarantee the models will be built or incorporated into the airlines' routes.

Go deeper

These technologies could bring America to net zero emissions by 2050

Illustration: Sarah Grillo/Axios

The newest section of a project from Third Way, the Bipartisan Policy Project and Clean Air Task Force examines how energy breakthroughs could accelerate America's transition to reach net zero greenhouse gas emissions by 2050.

Why it matters: The report chapter, provided first to Axios, is part of a broader effort known as the Decarb America Research Initiative, which explores the best ways to move the U.S. toward a net zero carbon emissions future by 2050.

Biden's pick to lead major banking regulator drops out

Saule Omarova, nominee for Comptroller of the Currency, at a confirmation hearing on Nov. 18. Photo: Anna Moneymaker/Getty Images

President Biden's pick to head one of the country's most powerful banking regulators is dropping out of consideration for the post, according to a statement from Biden that accepted the withdrawal.

Why it matters: Saule Omarova, nominated to lead the Office of the Comptroller of the Currency, faced a tough path to confirmation — with opposition from Republicans and moderate Democrats.

Judge temporarily blocks Biden vaccine mandate for federal contractors

Photo: Chip Somodevilla via Getty Images

A federal judge on Tuesday temporarily blocked President Biden's vaccine mandate for federal contractors nationwide.

Why it matters: It's the latest setback in the Biden administration's rollout of COVID-19 vaccine requirements. Federal judges in two states temporarily barred the administration from enforcing mandates for millions of workers last week.