What affects state-level public opinion on Medicaid? I leverage the passage of the ACA, which has given a more prominent role to states when it comes to Medicaid policies. I utilize multilevel regression and poststratification (MRP) - to analyze new state-level public opinion on Medicaid before (2005) and after (2012) the ACA was passed. The core question is (Kaiser Family Foundation survey): "I'm going to read you a list of federal government programs and for each one, please tell me how important you think this program is. Is it very important, somewhat important, not very important, or not at all important? What about Medicaid?" Results indicate Medicaid support diversified, with a larger range of views and an overall drop in importance rankings. Both years correlate with American Ideology Project data; conservative-leaning states tend to give less importance to Medicaid than liberal ones. The four states (IL, WV, FL, OK) that underwent the greatest drop in public opinion come from different sides of the Medicaid opinion and ideology spectrums and have different Medicaid expansion trajectories. A combination of public opinion, ideologies, and income inequalities play key roles in explaining these states' trajectories. [ABSTRACT FROM AUTHOR]