When President Barack Obama is trying to persuade Americans not to do something, he has a go-to line: 'That's not who we are.' Whether the issue involves discrimination, immigration, torture, criminal violence or health care, he invokes the nation's very identity.

"Catholicism is a wide tent in terms of political and legal positions. We could have nine Catholics on the Supreme Court and a great deal of diversity toward the law."

Cass Sunstein

"If government is to respect people's autonomy, or to treat them with dignity, it should not deprive them of freedom. It should treat them as adults, rather than children or infants."

Cass Sunstein