Bipartisan legislation that would make it easier for small and midsized breweries in the St. Louis area to increase their production has earned the backing of U.S. Senator Claire McCaskill. McCaskill is supporting the Small BREW Act, which would affect thousands of small and independent craft breweries that make up 11 percent of the U.S. beer market. Missouri is home to a growing craft brewing industry, with nearly 50 new craft breweries in the state opening their doors in only the last five years.