St. Sure insisted during his early days on the bench that women be permitted to sit on federal juries, explaining he "had two years' experience with women jurors when I was on the superior court bench in Alameda County and found them conscientious, independent, highly intelligent, and willing to serve".[4]
In 1939, lettuce workers in Salinas, California, were blacklisted by employers for their union activities. Attorneys provided by the International Longshore and Warehouse Union (ILWU) brought action and St. Sure, in the first instance of its kind, issued an injunction holding blacklisting to be illegal.[5]
St. Sure was the federal judge who signed the order giving the United States Navy title to Treasure Island, California, after it formally served notice of its unilateral declaration taking ownership on April 17, 1942.[6]