Sen. Elizabeth Warren and Washington Gov. Jay Inslee. Photos: Bastiaan Slabbers/NurPhoto and Scott Olson via Getty Images

We know 2020 Democrats are debating how to tackle climate change — but now there's growing pressure to have them do it on the actual debate stage.

Driving the news: 3 Democratic senators on Thursday wrote to NBC, host of the first primary debate in late June, urging them to devote a "significant" amount of time to climate.

  • "There are many ways to address the climate crisis, and voters want to know what policies each candidate supports," Sens. Brian Schatz, Sheldon Whitehouse and Martin Heinrich wrote.
  • The letter cites polls showing high primary voter interest.

Our thought bubble: NBC did not provide comment. And I don't really expect the network to say, "Sure, no problem, we'll let 3 senators dictate how we run our debate."

  • Yes, but: I think NBC is likely to include questions on the topic. And I bet we will see more than just glancing discussion in other debates too, a turnaround from past elections when it was largely absent.

The intrigue: 2020 hopeful Washington Gov. Jay Inslee is pushing the Democratic National Committee to set up a debate focused solely on climate. Sen. Elizabeth Warren backs the idea of a climate debate too, but the DNC has not endorsed it.

Go deeper: Climate change is a massive issue for Democrats in 2020

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Updated 28 mins ago - Politics & Policy

Supreme Court clears way for first federal execution since 2003

Lethal injection facility in San Quentin, California. Photo: California Department of Corrections and Rehabilitation via Getty Images

The Supreme Court ruled early Tuesday that federal executions can resume, reversing a lower court decision and paving the way for the first lethal injection since 2003 to take place at a federal prison in Indiana, AP reports.

The big picture: A lower court had delayed the execution, saying inmates had provided evidence the government's plan to carry out executions using lethal injections "poses an unconstitutionally significant risk of serious pain."

1 hour ago - Health

More Republicans say they're wearing masks

Data: Axios/Ipsos poll; Chart: Andrew Witherspoon/Axios

Nearly two-thirds of Americans — and a noticeably increasing number of Republicans — say they’re wearing a face mask whenever they leave the house, according to the latest installment of the Axios-Ipsos Coronavirus Index.

Why it matters: A weakening partisan divide over masks, and a broad-based increase in the number of people wearing them, would be a welcome development as most of the country tries to beat back a rapidly growing outbreak.

Buildings are getting tested for coronavirus, too

Illustration: Eniola Odetunde/Axios

Testing buildings — not just people — could be an important way to stop the spread of the coronavirus.

Why it matters: People won't feel safe returning to schools, offices, bars and restaurants unless they can be assured they won't be infected by coronavirus particles lingering in the air — or being pumped through the buildings' air ducts. One day, even office furniture lined with plants could be used to clean air in cubicles.