Identifying Flaw in Causal Reasoning

In a recent public debate, a politician argued that increasing the minimum wage will lead to a higher rate of unemployment, pointing to studies conducted in several cities where minimum wage increases were followed by job losses. As evidence of this correlation, the politician also referenced a national report indicating that during previous minimum wage increases, employment in the low-wage sector declined.

Critics of the politician's argument contend that correlation does not imply causation and that other factors, such as economic recession or local industry changes, might have influenced the employment rates in those cities. Which of the following most accurately identifies a flaw in the politician's reasoning?