Medicaid is a government program and Obamacare plans are offered through private health insurance companies. The word Obamacare is used to describe polices obtained through an Affordable Care Act (ACA) health exchange.
JFk ran against Republican candidate Richard Nixon for the 1960 presidential election.
Who did Lyndon B. Johnson run against?   Barry Goldwater in 1964. Johnson won by 486 electoral votes to 52, carrying all the states except Alabama, Arizona, Georgia, Mississippi, Louisiana and South Carolina.