Washington Gov. Jay Inslee Jay Robert InsleeBarr asked prosecutors to explore charging Seattle mayor over protest zone: report Bottom line Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE criticized fellow 2020 Democratic presidential hopeful Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE’s approach to climate policy early Thursday, saying the former vice president needs to “step up his game.”

“I will reserve judgment until we see what Joe Biden actually proposes, and I will wait and see if he can match the commitments that I have made to the American people,” Inslee, who has made climate action the central theme of his presidential campaign, said at a campaign event in Washington D.C. to introduce his climate plan.

“If he does that, I think it will be a great day for the Democratic Party," he added. "But to do so, he’s going to have to up his game.”

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Inslee’s climate plan, which calls for a $9 trillion investment to promote a green economy, aims to create 8 million jobs over the next decade. It includes $3 trillion in public investment as well as investments in housing and municipal infrastructure.

“Just as it did in the 20th century, America must rise to this 21st century challenge with a bold plan to: create jobs; protect workers’ rights; repower the economy; rebuild our infrastructure; and reinvest in innovation,” Inslee said Thursday.

The governor has previously called out other Democratic presidential candidates for what he perceives as insufficient commitment to the threat of climate change.

In April, he said former Rep. Beto O’Rourke (D-Texas), who released his own climate plan, “did not lead” on the issue during his time in Congress.

Biden, the front-runner in the Democratic field, took criticism from the left flank of the party after saying he supported a “middle ground” on climate issues. Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezWells Fargo CEO issues apology after saying there was a 'limited pool of Black talent' Brand responds to Trump claim protesters throw tuna cans at police: 'Eat em, don't throw em' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context MORE (D-N.Y.), a chief advocate for the Green New Deal, called the idea a “deal-breaker.”