Li Arellano holds a degree from the University of Michigan and served in the United States Army post-9/11. He spent several years in local politics, including serving as Mayor of Dixon during a period of significant municipal challenges. Arellano has a background in managing institutional risk in high-finance, which he transitioned into public service roles. He has experience in state politics, having run for the Illinois House of Representatives and the Illinois Senate, culminating in his current position as State Senator for the 37th District. Arellano is also a Squad Leader in the Army Reserves and has focused on economic development, public health, and infrastructure during his political career.

Li Arellano's political identity is marked by a blend of military experience and local governance, underpinned by a focus on economic development and fiscal responsibility. His strategic philosophy reveals an ideological agility, as evidenced by his unexpected convergence with opposing factions on environmental regulations. Arellano's rhetorical style is rooted in personal narratives, leveraging his entrepreneurial background and military service to frame policy discussions. This combination of military discipline and local economic focus creates a unique tension in his policy stances, prompting deeper inquiry into how he balances these seemingly disparate priorities.