The Swiss National Bank said Thursday that tariffs on goods to the U.S. present a "major challenge" for exporters, with its economy set to take a hit.The country has swallowed some of the highest duties imposed by President Donald Trump's administration, with a 39% tariff rate implemented in August. It came after a Swiss delegation led by the country's President Karin Keller-Sutter failed to secure a trade deal after meeting with Trump in Washington D.C."The U.S. tariffs present a major challenge for affect ...