How is the debate over the legalization of marijuana an issue of federalism?

Its about State law vs Federal Law

Explanation:

For a very brief explanation, federally the "grass" is illegal. But in some states, it's legal for either recreational and medical use. According to Cornell law, "Federalism is a system of government in which the same territory is controlled by two levels of government. Generally, an overarching national government is responsible for broader governance of larger territorial areas, while the smaller subdivisions, states, and cities govern the issues of local concern." In the case of the "grass" the federal government has the broad rule of outlawing it, but the federal government makes no effort to enforce the federal rule, as the DOJ would not take up the case of simple possession. So it's left up to the states.

quid pro quo sexual harassment typically involves an employee being pressured by a superior to provide sexual favors in order to avoid being fired or demoted, or in order to get a promotion, raise or perk.

"quid pro quo" harassment takes place when a supervisor requires sex, sexual favors, or sexual contact from an employee/job candidate as a condition of their employment. only supervisors who have the authority to make tangible employment actions (i.e. hire, fire, promote, can commit "quid pro quo" harassment.