The article focuses on Mugiyono's act of "jumping over fences" from his endorsing party during his candidacy for the 2020 Demak Election. As a senior PDIP cadre, he switched into the Gerindra and Nasdem coalition. The argument built in this article is that external forces drove the change of the candidate's party. This research was conducted based on a qualitative research approach (case study type). Informants were selected purposively with the snowball technique. Data were collected by interviews and documentation studies, which was through online media news document searches. We found that the external factor, i.e., public support at the beginning of the nomination, particularly the order from religious clerics (dawuh kyai) and funding, was a driving factor for Mugiyono's decision. This study demonstrated that this behavior was not explained by oligarchic theory but also by the institutionalization of political parties.