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Reproduced from NOAA; Chart: Axios Visuals

Last month brought the highest level of atmospheric CO2 concentrations ever recorded at 417 parts per million, per new data from the National Oceanic and Atmospheric Administration.

Why it matters: Measurements at the Mauna Loa Observatory in Hawaii show that while emissions have recently fallen due to the pandemic, it's not something that really changes the overall picture of ongoing buildup.

What they're saying: "[T]he buildup of CO2 is a bit like trash in a landfill. As we keep emitting, it keeps piling up," said geochemist Ralph Keeling of Scripps Institution of Oceanography in a statement alongside the data.

  • "The crisis has slowed emissions, but not enough to show up perceptibly at Mauna Loa. What will matter much more is the trajectory we take coming out of this situation," he said.

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Bill Clinton slams McConnell and Trump: "Their first value is power"

Former President Bill Clinton on Sunday called Senate Majority Leader Mitch McConnell's (R-Ky.) vow to fill Ruth Bader Ginsburg's vacant Supreme Court seat before the next presidential inauguration "superficially hypocritical."

The big picture: Clinton, who nominated Ginsburg to the court in 1993, declined to say whether he thinks Democrats should respond by adding more justices if they take back the Senate and the White House in November. Instead, he called on Republicans to "remember the example Abraham Lincoln set" by not confirming a justice in an election year.

Pelosi: Trump wants to "crush" ACA with Ginsburg replacement

House Speaker Nancy Pelosi said on ABC's "This Week" on Sunday that President Trump is rushing to replace the late Supreme Court Justice Ruth Bader Ginsburg because he "wants to crush the Affordable Care Act."

Why it matters: Pelosi wants to steer the conversation around the potential Ginsburg replacement to health care, which polls show is a top issue for voters, especially amid the coronavirus pandemic. The Trump administration has urged the courts to strike down the law, and with it, protections for millions with pre-existing conditions.

Mike Allen, author of AM
Updated 2 hours ago - Politics & Policy

Democrats' Armageddon option

A makeshift memorial outside the Supreme Court yesterday. Photo: Jose Luis Magana/AFP via Getty Images

Furious Democrats are considering total war — profound changes to two branches of government, and even adding stars to the flag — if Republicans jam through a Supreme Court nominee, then lose control of the Senate.

On the table: Adding Supreme Court justices ... eliminating the Senate's 60-vote threshold to end filibusters ... and statehood for D.C. and Puerto Rico. "If he holds a vote in 2020, we pack the court in 2021," Rep. Joe Kennedy III (D-Mass.) tweeted.