Answer:
<em>Jackson was quick to clarify that this did not imply that he would approve of projects which were of "national" character. Even though there is not a constitutional argument to be made against this type of action, it would be unwise to do so at the time, given the public debt. Until the debt was paid off, there would be no surplus to spend on these projects.</em>
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<em>Generally, Jackson supported internal improvements. During his first term, he sanctioned federal expenditures for transportation projects at a rate nearly double that of the expenditures under President John Quincy Adams.[7] It was seen as good policy to spend federal money on national improvements, as long as two conditions were met. First, they should be done pursuant to a general system of improvement, not by ad hoc legislation. Second, the Constitution should be amended to make clear the limits on federal power.[8]</em>
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<em>Some scholars[who?] argue that Jackson's veto can be seen as largely driven by personal, rather than political motives, particularly given Jackson's approval of internal improvement bills with as much a local nature as the Maysville Road. Jackson's veto may have been one of the many manifestations of the rivalry between Jackson and Henry Clay, who was one of the major proponents of the Maysville Road as part of his American System. </em>
source : https://en.wikipedia.org/wiki/Maysville_Road_veto
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