Wu's conflict with the younger Chiang worsened. Wu submitted his resignation to the elder Chiang but it was rejected. In April 1952, an alleged assassination targeting Wu was suspected. In April 1953, he (successfully) resigned from his position as governor and on 24 May 1953 he hastily left Taiwan on a "lecture tour". Wu's family left for the United States, except one son who was not permitted to leave by the Chiangs. In 1954, a wave of accusations appeared in Taiwan alleging Wu's corruption. At the same time, the Chiangs moved to dismiss Wu's associates from government. They also formally expelled Wu from the Kuomintang. Following his son's departure from Taiwan, Wu began to speak out against what he saw were serious problems with the Kuomintang government. That same year, Wu wrote an article in Look magazine entitled "Your Money is Building a Police State in Taiwan". The war of words between Wu and Chiang's regime escalated further, including a resolution against him by the ROC's National Assembly. Later in 1954, a war of words also erupted between Wu and Hu Shih, who was also in the United States at the time.
