Fitzsimons was asked to represent Pennsylvania at the Federal [[Constitutional Convention]] in 1787. There, he argued strongly that the Federal government should have the ability to tax imports and exports. Following the Convention, he signed the Constitution<ref>[http://bioguide.congress.gov/scripts/biodisplay.pl?index=F000178 FITZSIMONS, Thomas, (1741 - 1811)]</ref> and was instrumental in advocating its ratification.<ref>http://www.history.army.mil/books/RevWar/ss/fitzsimons.htm</ref> | Fitzsimons was asked to represent Pennsylvania at the Federal [[Constitutional Convention]] in 1787. There, he argued strongly that the Federal government should have the ability to tax imports and exports. Following the Convention, he signed the Constitution<ref>[http://bioguide.congress.gov/scripts/biodisplay.pl?index=F000178 FITZSIMONS, Thomas, (1741 - 1811)]</ref> and was instrumental in advocating its ratification.<ref>http://www.history.army.mil/books/RevWar/ss/fitzsimons.htm</ref> |