Former Vice President Joe Biden claimed Monday that congressional Republicans want to undo decades of progress on U.S. healthcare policy.

"As vice president, I met with Americans all across our country. What they told me over and over is that the Affordable Care Act gave them peace of mind," Biden wrote in an op-ed Monday. "They told me that because when the ACA became law and healthcare coverage was extended to millions of people, it meant we had finally decided, as a nation, that healthcare is a right for all and not a privilege for the few."

"In my 36 years as a senator, I saw my colleagues take plenty of hard votes. This just isn't one of them. If Republican leadership wants to improve the ACA, let's first come to an agreement that everyone should have health coverage. Then, based on that premise, let's have a debate about how best to improve care and reduce costs," said Biden.

Democrats have refused to work with Republicans during the process of repealing and replacing the Affordable Care, which many Democrats admit has flaws. Still, Democrats like Biden, have continued to urge Republicans to help them improve Obamacare, while the GOP insists on going its own route.

The former Democratic senator from Delaware said 70 million people rely on Medicaid, which is not set to be expanded under conservatives' reform bill.

Biden warned against Senate Majority Leader Mitch McConnell's saying there is time to make changes to the bill before it gets a vote.

"But it shouldn't even get there, because his bill can't be fixed. By denying that all Americans have a right to health care, it's fundamentally flawed," Biden said. "And Republicans are underestimating the American people if they think a few changes to the bill here or there will convince us that this bill is anything but a big step backward."