The short answer is that because Madison vetoed the Bonus Bill during the twilight hours of his presidency in 1817, and Monroe followed up with a veto of internal improvements a few years later. Republican controlled congresses passed internal improvement legislation, with Calhoun the nationalist giving a rousing speech arguing in favor of improvements claiming that it would "bind the republic together with a perfect system of roads and canals. Let us conquer space" and prevent disunion (over a divided Federalist party that tended to oppose or split national legislation like BOTUS II and High Tariffs, and the 98'ers faction of state's rights advocates) . Monroe's veto message included language that justified internal improvements on military grounds, potentially opening the ground for new legislation. Towards the end of his Presidency Monroe privately sought an opinion on the constitutionality of Federal internal improvements from the Supreme Court, and possibly to the surprise of a modern viewer he received a response favorable to the constitutional question and would later enact favorable internal improvements legislation. By the end of Monroe's presidency the party was splintering into factions but the Nationalist Republicans continued to call for federal internal improvements based largely upon Gallatin's ( Jefferson's secretary of the treasury) 1808 report, and the Nationalist Republican economic thought would continue to influence the later Whig and Lincoln Republican party.