Sen. John McCain speaks about global warming on Capitol Hill in 2004. Photo: Mark Wilson/Getty Images

The late Sen. John McCain explored and embraced science on global warming and co-authored early versions of cap-and-trade legislation, working across the aisle.

Flashback: Via Bloomberg BNA, "When McCain won the Republican Party’s presidential nomination in 2008 to face off against Obama, it was the first time both candidates for the presidency backed legislation to cap U.S. emissions."

  • The cap-and-trade measures he introduced ultimately failed in 2003 and 2005 (though the 2003 version got 55 votes).

Yes, but: McCain grew less involved with the topic as the years went on.

  • This detailed story from Inside Climate News yesterday points out that he didn't work on efforts to craft a Senate bill in 2010, when the Senate's political window to get a bill across the finish line had opened (though its debatable by how much).
  • He also voted for an unsuccessful measure that year to thwart the Obama administration's regulatory authority over greenhouse gases.

The intrigue: However, in 2017 he cast the decisive vote when the Senate very narrowly rejected a GOP-led move to kill Obama-era regulations to curb methane emissions from oil-and-gas development on public lands.

  • "McCain can be seen on the floor facing off heatedly against a half-dozen GOP senators who surround and block him before he gestures thumbs-down, a foreshadowing of his later decisive vote against the Obamacare repeal," Inside Climate News reports.

Go deeper

Appeals court upholds six-day extension for counting Wisconsin ballots

Photo: Derek R. Henkle/AFP via Getty Images

A federal appeals court on Tuesday upheld a lower court ruling that extended the deadline for counting mail-in ballots in Wisconsin until Nov. 9 as long as they are postmarked by the Nov. 3 election, AP reports.

Why it matters: It's a big win for Democrats that also means that the winner of Wisconsin, a key presidential swing state, won't be known for six days after the election. Republicans are likely to appeal the ruling to the Supreme Court, as the Pennsylvania GOP did after a similar ruling on Monday.

Go deeper: How the Supreme Court could decide the election

Updated 14 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 7 p.m. ET: 33,489,205 — Total deaths: 1,004,278 — Total recoveries: 23,243,613Map.
  2. U.S.: Total confirmed cases as of 7 p.m ET: 7,183,367 — Total deaths: 205,883 — Total recoveries: 2,794,608 — Total tests: 102,342,416Map.
  3. Health: Americans won't take Trump's word on the vaccine, Axios-Ipsos poll finds.
  4. States: NYC's coronavirus positivity rate spikes to highest since June.
  5. Sports: Tennessee Titans close facility amid NFL's first coronavirus outbreak.
  6. World: U.K. beats previous record for new coronavirus cases.
  7. Work: United States of burnout — Asian American unemployment spikes amid pandemic

What to watch in tonight's debate

Joe Biden (left) and President Trump (right) are facing off in Cleveland for the first presidential debate. Photos: Alex Wong (of Biden) and David Hume Kennerly (of Trump)/Getty Images

President Trump will try to break Joe Biden's composure by going after his son Hunter and other family members in tonight's first presidential debate — a campaign source tells Axios "nothing will be off the table" — while Biden plans to stick to the economy, coronavirus and new revelations about how Trump avoided paying taxes.

Driving the news: Biden and Trump are set to debate at 9pm ET at Case Western Reserve University in Cleveland, and it will be moderated by Fox News' Chris Wallace.