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.
In the 1976 election for president, Jimmy Carter ran against Gerald  Ford. In 1980, Carter ran and lost against Ronald Reagan.