Dairy farmers are caught in a vortex that includes low milk prices, uncertainty about export markets and President Donald Trump’s tariffs, among other factors, that have created “pretty near crisis time,” says U.S. Sen. Tammy Baldwin.The Wisconsin Democrat made that assessment during a press conference Monday after she toured Organic Valley’s Cashton distribution center and spoke with officials, members and employees of the cooperative. The export market is especially concerning, with 90 percent of the milk in Wisconsin being used in cheese, and 25 percent of the cheese going to Mexico, which may increase tariffs as pushback against Trump’s tariffs, Baldwin said.