In the meantime, Van Buren had returned to his seat in Congress. He entered the United States Senate in 1821, and, although observing the decorum expected of a new member of that body, he displayed powers of mind that distinguished him as a senator of more than ordinary ability. He now became a parliamentary orator, putting himself at the head of an anti-Administration faction, and developing the tact and management of a great parliamentary leader. He had made up his mind that nothing less than a large and comprehensive difference between the two wings of the Republican party would be of any real use; so he arraigned the Administration, with great violence, as un-Republican and Federalistic. He took a definite stand against internal improvements by the United States government; he led the opposition to the appointment of American representatives to the Congress of Panama, treating the proposed mission as unconstitutional and dangerous; and he charged the Administration with returning to the practices of the Federalist party, to which Adams originally belonged, declaring that the presidential choice of 1825 was not only the restoration of the men of 1798, but of the principles of that day; that the spirit of encroachment had become more wary, but not more honest; and that the system then was coercion, now it was seduction. He classed the famous alien and sedition laws, of the elder Adams, with the bold avowal of the younger Adams that it belonged to the President alone to decide upon the propriety of a foreign mission. Thus, he associated the administration of John Quincy Adams with the administration of his father, insisting that if the earlier one deserved the retribution of a Republican victory, the latter one deserved a similar fate.