Frank Biden, who just so happens to be Vice-President Joe Biden’s brother (he told me twice when I met him briefly at Lynn University in Palm Beach County almost two years ago), is selling charter schools. He represents a for-profit chain called Mavericks. The chain makes some big claims. The results are not so impressive. That never stops snake-oil salesmen. No one ever cured lumbago or grew new hair by rubbing in snake oil. But that never changes the pitch of the salesmen.