Final answer:
Donald can claim his Constitutional right to conduct business in Seattle, Washington, under the Privileges and Immunities Clause, which prevents states from discriminating against citizens from other states in favor of their own.
Step-by-step explanation:
Donald, the businessman who wants to open a new business in Seattle, Washington, could argue that he has a Constitutional right to enter other states and conduct business under the Privileges and Immunities Clause.
The Privileges and Immunities Clause states that 'the citizens of each state shall be entitled to all privileges and immunities of citizens in the several states' (Article IV, Section 2) of the United States Constitution. This means that a state cannot discriminate against citizens from other states in favor of its own citizens. Therefore, Donald has the right to conduct business in other states including Washington without being treated differently.
Learn more about Privileges and Immunities Clause