Wine grapes are processed on a conveyor belt at Grgich Hills Estate in Rutherford, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

The Napa Wine Train rides by a vineyard in Yountville, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

This aerial view shows tourists visiting the Castello di Amorosa winery in Calistoga, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

Workers sift through wine grapes on a conveyor belt at Grgich Hills Estate in Rutherford, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

A tourist takes a chance to try the wine grape-stomping process at Grgich Hills Estate in Rutherford, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

Tourists participate in a wine tasting at Grgich Hills Estate in Rutherford, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

A worker sifts through wine grapes on a conveyor belt at Grgich Hills Estate in Rutherford, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)

This aerial view shows the Castello di Amorosa winery with its wine steel tanks in Calistoga, in California's Napa Valley, on October 05, 2026. Napa Valley rose to international fame when its wines beat the French, turning this corner of California into a destination for oenophiles. But US President Donald Trump's unpredictable tariff policies and his seemingly endless attacks on traditional allies is souring the area's relationship with the foreign tourists and international markets it has grown to depend on. (Photo by Josh Edelson / AFP via Getty Images)