This fallen blue chip stock still faces formidable long-term challenges.Constellation Brands (STZ 1.43%), one of the world's largest producers of beers, wines, and spirits, was considered a stable blue chip stock. But over the past three years, Constellation's stock declined more than 40% as the S&P 500 rallied over 70%.Constellation lost its luster as its growth stalled out, it grappled with rising tariffs, and it racked up steep losses. But can it overcome those challenges over the next three years? Why d ...