According to the Constitution's Article I, Section 8, Clause 3, Congress has the right <span>to make all laws necessary and proper to carry out all powers the Constitution vests in the national government.</span>
Here is the answer to the given question above. The abolitionists oppose annexation of new western territory during the 1840 because they <span>feared admission of the new slave states. The abolition movement campaigned for no more slaves. Hope this answers your question. </span>