A more thorough explanation:

Definition: Policy stacking is a term used in insurance to describe the process of obtaining benefits from a second policy on the same claim when recovery from the first policy alone would be inadequate. It can also refer to a gerrymandering technique in which a large political or racial group is combined in the same district with a larger opposition group.

Example 1: Let's say you get into a car accident and your medical bills exceed the coverage limit of your car insurance policy. If you have another insurance policy that covers medical expenses, you may be able to use it to cover the remaining costs. This is an example of policy stacking.

Example 2: In politics, policy stacking can refer to a tactic used to manipulate voting districts. For example, if a political party wants to weaken the voting power of a particular group, they may redraw the district lines so that the group is combined with a larger opposition group. This dilutes their voting power and makes it harder for them to elect representatives who will advocate for their interests.

Both examples illustrate the concept of policy stacking, which involves combining multiple policies or groups to achieve a desired outcome. In the case of insurance, policy stacking can help individuals get the coverage they need when one policy is not enough. In politics, policy stacking can be used to gain an advantage in elections by manipulating voting districts.