Americans may need to bring in the kids; the presidential election promises to get ugly, a race to the bottom.
Hillary Clinton and Donald Trump both arouse strong passions, many of them negative. Both play tough.
She is a policy wonk, but Trump has little interest in a wide-ranging debate on issues. In the Republican primaries, Jeb Bush, Marco Rubio and Ted Cruz all tried at times to challenge him on substance; he brushed them aside with pointed personal rejoinders. It worked remarkably well.
But a campaign dominated by personal invective and political mudslinging exacerbates polarization and makes governing tougher, say knowledgeable veterans of other campaigns and administrations.
"If campaigns are not thoughtfully policy-oriented it makes it harder for those who have to govern," says Andrew Card, who was chief of staff to George W. Bush and now is president of Franklin Pierce University.