Noting the similarities between 2009 and 2021 -- a new Democratic president taking office with an ambitious policy agenda and his party holding majorities in the House and Senate -- Dan Hopkins examines what lessons President Biden and the Democrats might learn for this year's policy debates (e.g., new COVID-19 economic-relief legislation) from the public's reaction to President Obama's rollout of the Affordable Care Act in 2009-2010. Hopkins focuses on a few major themes, such as how, when a bill has numerous provisions (as the ACA did), the public will likely focus on controversial and unpopular facets of the legislation, rather than its popular parts.