In the presidential election of 1972 Richard Nixon beat George McGovern in every state except Massachusetts. But tough times were ahead for Nixon as the Watergate scandal became more widely publicized. And since then Nixon became the personification of an evil president in popular opinion.
Here's the funny part. Years later polls showed that an impossible number of people claimed to have voted for McGovern instead of Nixon. They were on the popular side at the time of the election, and after opinions changed about Nixon, they were on the popular side then, too.
Fast forward to a few days ago when poll results tell us that an astonishing number of Americans remember opposing the 2003 Iraq war. Take a look at these Yougov comparisons. Back in 2003 a poll showed that 63% supported the war. But in 2015 only 38% will admit they supported the war back then.
So are people really remembering wrong? Maybe. Or perhaps they're just providing poll takers with the answers that make them appear politically correct.