Jimmy Hoffa to the U.S. Senate in the 1964 election. Hoffa spent the next three years unsuccessfully appealing his 1964 convictions. Appeals filed by his chief counsel, St. Louis defense attorney Morris Shenker, reached the U.S. Supreme Court. He began serving his sentences in March 1967 at the Lewisburg Federal Penitentiary in Pennsylvania. Just before he entered prison, Hoffa appointed Frank Fitzsimmons as acting Teamsters president. Fitzsimmons was a Hoffa loyalist, fellow Detroit resident, and a longtime member of Teamsters Local 299, who owed his own high position in large part to Hoffa's influence. Despite this, Fitzsimmons soon distanced himself from Hoffa's
Jimmy Hoffa or imprisoned for virtually all of the 1960s. Hoffa was re-elected, without opposition, to a third five-year term as president of the IBT, despite having been convicted of jury tampering and mail fraud in court verdicts that were stayed pending review on appeal. Delegates in Miami Beach also elected Frank Fitzsimmons as first vice-president, to become president "if Hoffa has to serve a jail term". Hoffa had first faced major criminal investigations in 1957, as a result of the McClellan Senate hearings. He avoided conviction for several years. However, when John F. Kennedy was elected president in 1960, he appointed