Cheryl Siskin is the leader and the motivating force behind Indivisible Southern Delaware, the local chapter of one of the most effective progressive organizations in the country.

Indivisible is a movement that arose in response to the result of the 2016 election and has remained active and effective in the years since that horrible occasion. Founded by former Congressional staffers who published a handbook of methods for effective grass roots resistance, Indivisible grew into a "movement of thousands of group leaders and more than a million members taking regular, iterative, and increasingly complex actions to resist the GOPs agenda, elect local champions, and fight for progressive policies," according to its website.