[1] Broom was a dedicated supporter of a strong central government who had been appointed as a commissioner to the Annapolis Convention in 1786, although he failed to attend.
When George Washington visited Wilmington in 1783, Broom urged him to "contribute your advice and influence to promote that harmony and union of our infant governments which are so essential to the permanent establishment of our freedom, happiness, and prosperity."
Broom carried these opinions with him to Philadelphia, where he consistently voted for measures that would assure a powerful government responsive to the needs of the states.
He also sought to vest state legislatures with the power to select presidential electors, and he wanted the president to hold office for life.
Broom faithfully attended the sessions of the Convention in Philadelphia and spoke out several times on issues that he considered crucial, but he left most of the speech-making to more influential and experienced delegates.
Broom was also involved in an unsuccessful scheme to mine bog iron ore. A further interest was internal improvements: toll roads, canals, and bridges.