As of 2025, approximately 24 million people were enrolled through Affordable Care Act (ACA) insurance exchanges.
November 20, 2025
high
temporal
Enrollment magnitude for ACA marketplace exchanges.
Premium tax credits for Affordable Care Act marketplace enrollees can be applied on a monthly basis to reduce out‑of‑pocket premium costs.
November 20, 2025
high
temporal
Mechanism for how ACA premium assistance is delivered to enrollees.
Expanded federal subsidies introduced during the COVID‑19 pandemic reduced premiums for enrollees in Affordable Care Act marketplaces.
November 20, 2025
high
temporal
Policy change during the COVID‑19 period that affected ACA marketplace premiums.
Republican efforts to repeal or dismantle the Affordable Care Act during President Donald Trump’s first term failed and have been linked to Republican losses in the 2018 U.S. midterm elections.
November 06, 2018
high
temporal
Political consequences of failed repeal efforts against the ACA in the mid‑2010s.