Wine grapes pass through 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)

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)

The conductor of the Napa Wine Train checks on passengers as they stop 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)

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)

A tourist participates 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)

Tourists pose for photos while visiting 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)

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)

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)