Why were the colonist not able to represent themselves in parliament?

No Taxation without Representation. The Act resulted in violent protests in America and the colonists argued that there should be "No Taxation without Representation" and that it went against the British constitution to be forced to pay a tax to which they had not agreed through representation in Parliament.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

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