A struggling Napa Valley wine brand got a royal revival this week after one of its Chardonnays was poured for King Charles III and Queen Camilla during a lavish state dinner at the White House. Newton Vineyard in St. Helena said it was “honored” that its 2022 “Unfiltered” Chardonnay was one of three wines served Tuesday night at the dinner for the British monarch and queen consort, according to The Press Democrat . “We could not be more honored that our Newton Chardonnay was served at this prestigious event,” Newton managing partner Eric Seuthe told the outlet. The dinner was part of Charles and Camilla’s four-day visit to the US, which aimed to celebrate American independence and help improve US-British relations. A struggling Napa Valley wine brand got a royal White House revival this week after one of its Chardonnays was poured for King Charles III and Queen Camilla during a lavish state dinner.…