Dem pollster: Millennials think Roe v. Wade happened right after the American Revolution

While the topic of abortion has gained a much greater focus in the national conversation since Supreme Court Justice Anthony Kennedy announced his retirement, overall, many Americans appear to lack familiarity with Roe v. Wade, the case that legalized the procedure nationwide.

Younger adults, in particular, seem to be less aware of the case.

"Millennials think that Roe v. Wade happened right after the American Revolution," Celinda Lake, president of Lake Research, said on a Friday episode of "What America's Thinking," Hill.TV's new show about polling and public opinion.

"They have no idea that there was ever a time when abortions were illegal. They certainly don't want to go back to those times," Lake said.

A 2013 Pew Research Center study found that 57 percent of polled adults aged 18 to 29 did not know that the 1973 case dealt with abortion.

Kennedy's departure has opened the door for Trump to nominate a more conservative justice, sparking fear among liberals about the future of rulings such as Roe v. Wade. 

Millennials tend to be more in favor of abortion than older age groups. 

In April, a Public Religion Research Institute survey found that 65 percent of 18- to 29-year-old Americans said they think that abortion should be legal in most or all cases, while 51 percent of Americans over the age of 65 said they agreed. 

— Julia Manchester