Senate Minority Leader Chuck Schumer, D-N.Y., hit out at President Trump over his Saturday threat to withhold payments to insurers if a new healthcare bill is not approved in the near future and called on him to "stop playing politics with people's lives."

"If the President refuses to make the cost sharing reduction payments, every expert agrees that premiums will go up and health care will be more expensive for millions of Americans," Schumer said in a statement. "The president ought to stop playing politics with people's lives and health care, start leading and finally begin acting presidential."

Schumer was responding to a series of tweets from the president, who reiterated his plan to let the Affordable Care Act "implode" if no bill is passed.

The cost-sharing reductions have been a political sticking point in recent months as the administration has continued to make the payments for them despite threatening repeatedly to withhold them. The payments help subsidize insurance plans for those on the individual markets.

Experts say withholding the payments would cause premiums to skyrocket and make even more insurers leave the market altogether.

"After seven years of 'talking' Repeal & Replace, the people of our great country are still being forced to live with imploding ObamaCare!" Trump said. "If a new HealthCare Bill is not approved quickly, BAILOUTS for Insurance Companies and BAILOUTS for Members of Congress will end very soon!"

House Minority Leader Nancy Pelosi, D-Calif., echoed Schumer's concerns in a tweet of her own, calling on Trump to stop the "sabotage" of the healthcare system.

"Threatening to hike Americans' premiums is inexcusable. Stop the sabotage & work with Dems!" she wrote.