President Donald Trump and Republicans in Congress pursued several major efforts to repeal and replace the Affordable Care Act (ACA) but were unable to get a bill through the U.S. Senate in 2017. In 2018, Congress did pass a tax bill that eliminated the ACA’s tax penalty for not obtaining health coverage beginning in 2019.

In December 2019, a federal appeals court panel ruled that the law’s individual mandate is unconstitutional since Congress has set the mandate tax penalty to zero and sent the case back to a lower court to determine how much of the rest of the ACA should be invalidated. The case was first brought by a number of Republican state attorneys general, and the Trump administration now argues that nearly all of the ACA should be overturned. The U.S. Supreme Court has now agreed to review the case.

For information about ACA Marketplace Open Enrollment, including fact sheets and 300+ FAQs, visit our collection of resources on Understanding Health Insurance.

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ACA Open Enrollment: If You Buy Health Coverage in the Individual Market

This short explainer provides an overview of open enrollment and the 2020 individual insurance market, including Affordable Care Act (ACA) marketplaces, for consumers who buy their own plans rather than getting insurance through an employer.

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KFF Health Tracking Poll – October 2019: Health Care In The Democratic Debates, Congress, And The Courts

This poll examines health care issues in the Democratic presidential primary , government negotiation of prescription drug prices, party trust on health care, Medicare-for-all, and the pending Texas v. US lawsuit affecting the Affordable Care Act and pre-existing condition protections.

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Poll: Democrats Say They Are Hearing Enough From Presidential Candidates About Medicare-for-All and Expanding Coverage, But Want Them to Talk More about Health Costs and Women’s Health Care

Heading into tonight’s Democratic primary debate, most Democrats and Democratic-leaning independents say the candidates are spending the right amount or too much time talking about ways to provide coverage to more Americans and Medicare-for-all, two topics that have dominated health care discussions in the past three rounds of Democratic debates,…

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pre-existing conditions

Nearly 54 Million Americans Have Pre-Existing Conditions That Would Make Them Uninsurable in the Individual Market without the ACA

Almost Half of Non-Elderly Families have At Least One Adult with a Pre-Existing Condition An updated KFF analysis estimates that almost 54 million people – or 27% of all adults under 65 —have pre-existing health conditions that would likely have made them uninsurable in the individual markets that existed in…

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pre-existing conditions

Pre-Existing Condition Prevalence for Individuals and Families

This analysis estimates that almost 54 million people – or 27% of all adults under 65 —have pre-existing health conditions that would likely have made them uninsurable in the individual markets that existed in most states before the Affordable Care Act. Almost half (45%) of non-elderly families include at least one adult with such a pre-existing condition. The analysis also includes estimates by age, state and gender.

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JAMA Forum: What is Trumpcare?

The debate among Democratic presidential candidates about how to reform the health care system largely boils down to whether to build on the Affordable Care Act and create an option for people to enroll in Medicare or create a Medicare for all plan that covers everyone. On the other side…

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Most Democrats Prefer a Presidential Candidate Who Wants to Build on the ACA

KFF Health Tracking Poll – September 2019: Health Care Policy In Congress And On The Campaign Trail

This month’s poll probes Democrats’ views about the general approaches to expanding health coverage and lowering costs put forward by the candidates; the public’s health care priorities for Congress; and views about the ACA, Medicare-for-all and a “public option” health plan.

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Poll: Most Democrats Prefer a Presidential Candidate Who Wants to Build on the Affordable Care Act

The latest KFF Health Tracking Poll probes Democrats’ views about the general approaches to expanding health coverage and lowering costs put forward by the candidates. Most Democrats and Democratic-leaning independents (55%) say they prefer a candidate who would build on the Affordable Care Act to achieve those goals. Fewer (40%)…

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Enrollment in Individual Market Dips Slightly in Early 2019 after Repeal of Individual Mandate Penalty

Overall enrollment in the individual market fell 5% to 13.7 million in the first quarter of 2019 following the repeal of the ACA’s individual mandate penalty.

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A Comprehensive Review of Research Finds That the ACA Medicaid Expansion Has Reduced the Uninsured Rate and Uncompensated Care Costs in Expansion States, While Increasing Affordability and Access to Care and Producing State Budget Savings   

 Multiple studies over the last five years find that the Affordable Care Act’s Medicaid expansion has increased health coverage, affordability, and access to care while producing budget savings for states and reductions in uncompensated care costs for hospitals and clinics, according to a KFF review of more than 300 studies…

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