Leading political figures from the U.S. said they planned to fulfill what they could of the international Paris climate deal, even though President Trump said the federal government will be pulling out of it.

Speaking Saturday at a conference in Bonn, Germany, for world leaders who agreed to the deal, multiple high-profile Democrats said they still wanted U.S. cities and states to comply with the agreement.

“This is a pledge, and it’s a pledge that you cash because it’s real. We’re doing real stuff in California,” Democratic California Gov. Jerry Brown said, according to the Sacramento Bee. “When cities and states combine together, and then join with powerful corporation, that’s how we get stuff done.”

Democratic U.S. Sen. Ed Markey of Massachusetts said, "President Trump has called global warming a ‘hoax,’ he has assembled a cabinet of Big Oil all stars, fear is rampant across the federal government in terms of the scientists who work there every day, but on our side we have 100 years of science and nearly 100 percent of the scientists on the planet."

Former New York Mayor Michael Bloomberg, an independent often aligned with Democrats, also joined in.

"It is important for the world to know the American government may have pulled out of the Paris agreement, but the American people are committed to its goals and there is nothing Washington can do to stop it,” he said.

Trump in June announced that the U.S. would be withdrawing from the agreement, which the U.S. has entered under his predecessor, Barack Obama.

Trump denounced the deal as a handicap on U.S. productivity and a giveaway to less-developed countries.