Campbell was nominated by President
Franklin D. Roosevelt on September 24, 1940, to the
United States District Court for the Northern District of Illinois, to a new seat authorized by 54 Stat. 219. Campbell won national praise for the severity of the sentences. However, on appeal, the entire group had their convictions reversed due to technical errors. Walter and Otto later pleaded guilty to
misprision of treason and received 5-year sentences. Hans Haupt was retried, found guilty of treason once more, but received a life sentence. Charges were dropped against Lucille and Kate, albeit Erna Haupt was held until the war ended and deported in 1948. In 1957, Hans Haupt was granted clemency by President
Dwight D. Eisenhower and deported to Germany on the condition that he would never return to the United States. In 1965, Campbell took on Chicago kingpin
Sam Giancana. When Giancana was asked to testify before a Chicago
Grand Jury, he invoked his
fifth amendment right to remain silent. Campbell granted Giancana immunity from prosecution and ordered him to testify. After Giancana refused, he spent the next year in jail on contempt charges. ==Supreme Court consideration==