If the Jeffersonians had been driven from their first ground by this territorial acquisition, the Federalists had fared no better. They had first called into being the genii of the "implied powers," and now had the mortification of seeing it serve their enemies. Having swung in the change of 1801 from the "ins" to the "outs," they became the opposition party and were compelled to resist many measures and principles which they had formerly advocated. They had gradually lost State after State until they were confined to New England. The former great national party, the party of Hamilton, Jay, and Adams, the party to which Washington had leaned, was shrinking into a sectional faction. Where it had once wished to give the Union every means of aggrandisement, it was now compelled to oppose almost doubling its domain, lest the balance of power between the different parts be lost. It feared the ascendency which Louisiana would give to the Southern interests, never foreseeing from the shape of the addition that the advantage would in time lie with the North. Professing devotion to the Union, they would now deprive it of the advantages resulting from prolonging indefinitely its holding of colonies. They must have seen the result if the domain had never extended beyond the Mississippi. The territory both north and south of the Ohio would speedily be made into States according to existing arrangements. The great prestige inuring to the Union from territorial control would thereby cease. But with the addition of new provinces from time to time, the holding of territories preliminary to statehood must be indefinitely prolonged. The functions of the Union would be multiplied instead of diminished.

By the acquisition of Louisiana, Jefferson effectually settled the twenty years of internal dispute over the navigation of the lower Mississippi. From source to mouth, it flowed presumably through American territory. Americans were to be found on both sides the great water highway. Those west of the river had crossed upon invitation of Spain, who hoped in this way to people her province without loss to her other possessions. The colonists taken across the river by Colonel Morgan and others had caused no little alarm to statesmen in the Confederation days, lest the population of the United States be drawn off to people a Spanish possession and so weaken the Republic. Among the thirty-five thousand or more people to be found about the city of New Orleans and along the lower Mississippi and the Red rivers was a small percentage of Americans; but a much larger proportion was to be found in the six thousand inhabitants of St. Louis and the small villages near by.

This leaven of Americans affected the whole. They had been accustomed to the fostering hand of the National Government in the matter of improving means of transportation and communication in the older States from which they had migrated, and they did not hesitate to demand such aid for their new localities. Thus the people in their westward movement, carrying with them remembrances of the benefits of government assistance enjoyed in their former homes, have extended the system of national improvements across the continent.

There was a pressing demand for assistance in the Louisiana country. The province had been long neglected because of the frequent changes in ownership and the Latin method of colony holding. The task of Americanising this foreign element was imperative. The extent of territory to be brought under harmonious rule was extensive and varied. It was impossible for the Administration, in providing for the welfare and defence of the acquisition, not to be drawn into measure after measure of that paternalistic nature for which the party had so roundly criticised the Federalists. The sole management of Territories was vested in the National Government. The individual States could have no part in providing for the inhabitants of the Louisiana Purchase.

[Illustration: TAKING POSSESSION OF THE LOUISIANA PURCHASE. Occupying presumably the same balcony in which Laussat, Wilkinson, and Claiborne stood on the front of the Spanish cabildo at New Orleans, in December, 1803, witnessing the replacing of the French flag by the American flag in the public square below, there stand, in the illustration, the Governor of Louisiana, with a descendant of Claiborne, the Archbishop and the Mayor of New Orleans, enacting the scene in December, 1903.]

Federalist precedent had paved the way for Republican action. Since the Revolutionary days, Congress had been accustomed to maintain troops on the border for the protection of settlers. The establishment of forts in distant parts made necessary the construction of roads between the posts and their connection with the settled parts for the conveyance of troops and supplies. The addition of the vast tract of Louisiana demanded an immediate extension of military posts and military roads.

The Federalists had been accustomed, as previously described, to construct new post-roads instead of confining the mails to roads already built by State or private funds. Some of these post-roads were nothing more than a "trace" cut through the woods, which permitted a man on horseback to pass, carrying a post-bag. Even this could not be done without some expenditure. Occasionally the expense was met by a donation of public lands through which the trace passed. In other instances, payment was made from the postal receipts and appropriations. The constitutionality of such action had been attacked occasionally by the Republicans before they came into power. But having assumed the national control, they were compelled to continue the construction of military and post-roads. Even the fear of a standing army and the desire to economise could not warrant a neglect of the inhabitants scattered through the new possession. Congress owed protection to them not only as an implied power, but as an implied duty.

Thus it came about that Jefferson, who a few years before was taking Madison to task for thinking that the power to establish post-roads meant to construct new ones rather than to establish post-routes on those already made, was engaged with his Cabinet in planning a vast system of new highways to and through Louisiana. Among other enterprises, they contemplated a great post-road to New Orleans through Georgia, instead of the long water route heretofore used by way of Nashville and Natchez. The new way, it was estimated, would shorten the journey five hundred miles. Branches were planned to St. Louis and to Detroit. The difficulties of frontier travel may be imagined from the fact that the surveyor-general, who was despatched to examine the feasibility of the Georgia route, was nearly three months in reaching New Orleans from Washington.

Interested in scientific knowledge and exploration, and desirous of keeping American ships off the seas by developing internal trade, Jefferson had anticipated the purchase of Louisiana by proposing confidentially to Congress the despatch of a few men on an investigating trip up the Missouri River. Trade with the Indians needed to be cultivated in this manner, but no State was sufficiently concerned to undertake it. Jefferson found an easy way to warrant national action. "The interests of commerce," said he, "place the principal object within the constitutional powers and care of Congress." Not even Randolph, who deplored every departure from old policies, could ever regret the expenditure of the $2500 which sent the Lewis and Clark expedition across the continent and laid the claims for national addition nearly a half-century later. After this precedent, it was easy to send Lieutenant Pike to ascertain the true source of the Mississippi and to explore the vast plains on the south-west toward the Spanish possessions. Many expeditions for scientific purposes and for exploration have been sent by the National Government since that day; but it must be remembered that the practice was inaugurated under the strict constructionists, with no other warrant than "to regulate commerce."

The Lewis and Clark expedition called fresh attention to the possibilities of the great West, and justified the urgent demand of the Western people for national aid. The danger of Western secession had long since disappeared; but many plotters had shown a tendency to use the frontiersmen as allies in the European wars. Genet, over ten years before the Lewis and Clark expedition, contemplated the use of an American force against British Canada. Miranda proposed to use the same recruiting-ground for his movements on Spanish South America, and even Hamilton consented to the scheme, if he could be commander of the expedition. Now came Burr, planning an expedition of these hardy trans-Alleghenians into New Orleans and thence into the disintegrating Spanish possessions of the South-west. Napoleon's success seemed to have turned the heads of all ambitious men of the day toward foreign conquest and they proposed to use the Mississippi valley as a rallying-ground. To invade the territory of a nation with whom the United States was at peace was contrary to Federal law. Jefferson turned his attention toward punishing Burr on even more serious grounds; but Gallatin was keen enough to discover the cause for selecting the Western people as tools. It was not a novel idea to suggest better means of communication between the East and the West; but it was novel to attribute Western disaffection to a lack of touch and sympathy between the people of the two sections. Trade and intrigue with foreign neighbours, so Gallatin thought, could be suppressed more easily by kindness than by punishment. It was true that the National Government had permanently opened the Mississippi River as an outlet for the West. But the journey down was long and tedious, delays might be encountered at New Orleans because of the limited number of ocean vessels on which produce could be transshipped, and only a limited cargo if any was possible on the return journey up-stream. The increase in population and the consequent increase in the size of crops to be transported to a market would speedily bring a demand for some means of taking the products directly to the Atlantic seaboard and of bringing manufactured goods in return.