What was the colonist reaction To the declaratory act?

Answer 1

The colonists were outraged.

Answer 2

They were very unhappy about it, since the Act basically said that the British Parliament had the right to pass any law (including a law about new taxes) at any time, whether the colonists agreed with that law or not. Since the colonists still had no representation in Parliament, this was yet one more motivation for the colonists to consider a rebellion, and a number of American colonial leaders began to advocate for such a rebellion against British rule.