• Nearly 300 corporate executives have visited the White House this year, putting business leaders on par with senior lawmakers in influencing President Trump’s thinking.

The S.&P. 500 is up about 5 percent since Mr. Trump’s inauguration.

But the U.S. economy grew at just 0.7 percent in the first quarter of 2017, its slowest pace in three years. And the president’s threats to upend trade deals could carry their own costs.

Above, Wilbur Ross, left, the U.S. commerce secretary, and Jamie Dimon, chief executive of JPMorgan Chase, at the White House.