A group of Senate Republicans on Wednesday rolled out a last-ditch effort to repeal and replace the Affordable Care Act, but it is almost certain to face a legislative roadblock.

The bill, written by Sens. Lindsey Graham, Bill Cassidy, Dean Heller, and Ron Johnson, would primarily allocate federal funding for healthcare in block grants to states – a change from the current system, which allocates money based on a percentage of what states spend.

In a statement announcing the release of the bill – named after the senators – Graham touted the idea as a way to give states flexibility on healthcare spending.

“Our bill takes money and power out of Washington and gives it back to patients and states,” Graham said. “It takes us off the path to single payer healthcare – which would be a disaster – and puts us on a path toward local control.”

The bill has the support of some prominent Republicans, including Sen. John McCain, who cast the pivotal vote that killed the first push by the GOP to repeal the ACA, the law also known as Obamacare. But it does not appear to have the necessary support to pass the Senate.

Sen. Ted Cruz said the bill had the support of about 45 members of the GOP conference. Senate Majority Leader Mitch McConnell reportedly said the bill would get a vote if the senators could persuade 50 Republicans to support it. Typically, leadership tries to find votes for a bill it supports.

Lees ook op Business Insider Daimler stort zich op de markt voor elektrische trucks met 2 nieuwe modellen van Mercedes – en gaat strijd aan met Tesla en Nikola

The process by which Republicans would have to move the bill, known as budget reconciliation, also presents the biggest challenge, as it stamps a serious time crunch on their effort. The rules that would allow the bill to pass the Senate with a simple majority and avoid a Democratic filibuster are set to expire at the end of the month.

Sen. John Thune, the third-ranking Republican member of the Senate, told reporters that the bill would need a “double-double bank shot” to pass.

The bill does have the support of President Donald Trump, who applauded it in a statement after its release, though he did not explicitly tell other senators to vote for the bill.

“As I have continued to say, inaction is not an option, and I sincerely hope that Senators Graham and Cassidy have found a way to address the Obamacare crisis,” Trump’s statement said.

Another sticking point is whether key provisions of the proposal would qualify for budget reconciliation under what is known as the Byrd rule, which dictates that any part of a bill that does not affect the budget is stripped out.

Here’s a quick rundown of what the proposal would do:

Shift Medicaid funding and insurance subsidies to a block-grant system. Instead of determining the federal government’s share of funding for Obamacare’s Medicaid expansion and individual insurance subsidies, states would receive large chunks of money up front based on how many people with certain health statuses are living there – part of a complex formula that could cause a significant shift in federal funding among states. Just under $1.2 trillion would be allocated for this from 2020 through 2026. Pay cost-sharing subsidies through 2019. Such a move would help the insurance exchanges established by Obamacare stay stable in the short term – something Democrats have urged. When the block grants kick in, however, these payments would end. Maintain many Obamacare taxes. To avoid adding too much to the federal deficit – and being disqualified from the reconciliation process – the bill would preserve many major taxes created under Obamacare, such as the tax on net investment income. Eliminate the individual and employer mandates. People who do not sign up for insurance would not face a tax under the plan, and companies would not be compelled to offer coverage, though states could pass their own mandates. Include a state stability fund. The bill would allocate $10 billion in 2019 and $15 billion in 2020 for states to help bring down premiums and set up programs to get people coverage. Cut off money to abortion providers. None of the money allocated by the bill could go toward healthcare providers that offer abortion services.