[1] He graduated from the University of Pennsylvania Law School in 1904 and worked in the office of Samuel W. Salus, a lawyer and Republican state senator in Philadelphia.
[2] At the same time, Kun was a leader in Jewish community affairs, serving as district president of his branch of B’nai Brith.
[3] In 1927, following the death of Common Pleas President Judge Charles E. Bartlett, Governor John Stuchell Fisher appointed Kun to fill the vacancy.
[2] The Philadelphia Inquirer called the appointment "in the nature of a surprise," noting that Kun, although a Republican like Fisher, had not been active in politics for several years.
"[5] In 1952, Kun made headlines again when he issued an injunction to prevent a strike by mass transit workers of the Philadelphia Transportation Company, drawing the ire of labor activists.
Kun defended his record of issuing anti-strike injunctions in the PTC case and others, calling the activity against him "pure invention for political purposes and nothing else.
[9] As a result, Kun won the Republican nomination but lost the Democratic contest to Earl Chudoff, a member of the federal House of Representatives from Pennsylvania's 4th congressional district.