The Swiss president is heading to the U.S. in a last-ditch effort to head off punishing tariffs that threaten to cripple key sectors of the country’s export-reliant economy. President Trump’s recent decision to impose a 39% levy—one of the highest in the world—stunned the Alpine nation and upended months of negotiations in which Swiss officials believed they were on the verge of securing a favorable deal.

The Guinness brewer now expects to take a $200 million annual hit from tariffs, although it said it could mitigate half of that.