Republican Rep. Carlos Curbelo of Florida lost re-election Tuesday to his Democrat challenger, Debbie Mucarsel-Powell.

Why it matters: Curbelo, a two-term Republican, was a top target for the Democrats from the get-go and considered a bellwether of a blue wave. The outcome also represents a loss for the Climate Solutions Caucus, a bipartisan House caucus Curbelo founded in 2016.

The big picture: The 38-year-old Curbelo, first elected to Congress in 2014, embodies the moderate GOP mold considered key to Republicans keeping control of the House. He represents the tip of Florida, a swing district whose residents regularly experience rising sea levels, one of the clearest and most present impacts of climate change.

• Climate change is a top priority for Curbelo, who has regularly criticized President Trump on several issues.
• Curbelo introduced legislation in July that taxes carbon emissions, the first substantive climate legislation by a Republican in a decade.

In an interview this summer, Curbelo brushed off prospects of losing.

What’s next: The prospect of bipartisan climate policy, something many independent experts say is necessary to make substantive progress on the issue, drops significantly with Curbelo exiting Congress.

Go deeper: Climate change is finally getting political cred with Republicans