CEO Expert Jeffrey Sonnenfeld on Donald Trump and his Twitter Fights

Interviewed for the CBS News Weekend Roundup, Yale School of Management's senior associate dean for leadership studies -- Prof. Jeffrey Sonnenfeld -- talks about how corporate CEO's are dealing with Donald Trump's combative style, on Twitter and elsewhere.

Elaine Sciolino, Author in Paris - on France's Volatile Politics

Longtime New York Times correspondent Elaine Sciolino -- a former bureau chief in Paris -- author of The Only Street in Paris: Life on the Rue des Martyrs -- speaks to Dan Raviv, host of the CBS News Weekend Roundup, about these dramatic days in French politics.  They also discuss rightwing politicians throughout Europe.