Does partisanship influence whether citizens adopt public policies? Using longitudinal data on Affordable Care Act enrollment, we find Republicans significantly less likely to enroll than Democrats, controlling for other factors. This partisan gap is then addressed through a large-scale field experiment: presenting ACA options with reduced emphasis on government involvement and increased focus on market alternatives narrows the difference in uptake rates between partisans.

Findings:

* Enrollment likelihood varies by party affiliation even when adjusting for variables like age, income, and location.

Methodology:

* Longitudinal data analysis capturing trends over time.

* Randomized field experiment manipulating the political framing of ACA enrollment options.

This research shows that policy uptake is not merely an economic or informational choice but involves partisan politics. By altering how government's role was presented, we influenced behavior across party lines.