Final answer:
The laws that treat citizens of other states differently than Illinois citizens are unconstitutional according to the privileges and immunities clause in the Constitution.
Step-by-step explanation:
The laws that treat citizens of other states differently than Illinois citizens are unconstitutional according to the privileges and immunities clause in Article IV, Section 2 of the Constitution. The laws that treat citizens of other states differently than Illinois citizens are unconstitutional according to the privileges and immunities clause in the Constitution.
This clause ensures that citizens of each state are entitled to all privileges and immunities of citizens in the several states. However, there are some exceptions to this clause, such as offering reduced tuition to in-state students and limiting welfare services based on residency.