Cook took over from Deakin shortly before the 1913 election and won government by a single seat. One year later, Cook introduced a bill removing special treatment for union members. Cook knew the Labor Party had the numbers in Senate to defeat the bill. When the Senate rejected it twice, Cook had an excuse to call an early election for 5 September. This was the first double dissolution election in Australia. However CLP was soundly defeated, and Labor became the government. 