For those wondering if it was still possible for the Senate Republican leader, Mitch McConnell, to raise his cynicism game, Tuesday’s show vote on the Green New Deal supplied a resounding “yes.”

Of all the pressing business Mr. McConnell could be tackling, he devoted precious floor time to the resolution introduced last month by the Democrats Ed Markey, the junior senator from Massachusetts, and Alexandria Ocasio-Cortez, a House freshman from New York. A grand reimagining of America’s environmental and economic landscape, the Green New Deal is not a policy proposal. It is a statement of values — a nonbinding resolution that even its champions do not expect to become law. Ms. Ocasio-Cortez has called it “a vision document.”

Which is precisely why Mr. McConnell couldn’t resist it.

The Senate majority leader, like so much of his party, has zero interest in climate change — or rather, he has no interest in pursuing policies to address what many regard as the defining crisis of our time. Mr. McConnell is, however, passionate about making life politically awkward for the opposition. With their base voters fired up about climate change, dozens of Democratic lawmakers have embraced the Green New Deal, including at least half a dozen 2020 presidential contenders. Even so, the resolution’s sweeping ambitions — built around a huge infrastructure investment and a shift to carbon-free energy — strike more than a few Democrats, especially moderates, as unrealistic and politically perilous.

Republicans have been quick to mock the proposal, claiming that Democrats are poised to outlaw everything from cars to cows to airplanes. Mr. McConnell has been particularly vicious, slamming it as a “destructive socialist daydream.”