According to the Wall Street Journal, Trump was the main topic of conversation a gathering of corporate executives at the Yale CEO Caucus earlier this week. The economy has been on a roller coaster ride since Trump announced " and then almost immediately withdrew " punishing new tariffs on all goods imported from Canada and Mexico. 25% tariffs on Canadian imported steel and aluminum products went into effect Wednesday, however. When Trump suggested doubling his steel and aluminum tariffs, the roomful of CEOs " which included JPMorgan CEO Jamie Dimon, Pfizer CEO Albert Boula and Dell CEO Michael Dell " the Journal reported that the room "responded with a mix of groans and shocked laughter." There was universal revulsion against the Trump economic policies," Yale School of Management professor Jeffrey Sonnenfeld, who organized the event, told the paper. "They're also especially horrified about Canada."