Concert among the States for redress against the alien and sedition laws, as acts of usurped powers, was a leading sentiment; and the attainment of a concert was the immediate object of the course adopted by the [Virginia] Legislature; which was that of inviting the other States "to concur in declaring the acts to be unconstitutional, and to co-operate by the necessary and proper measures in maintaining unimpaired the authorities, rights, and liberties reserved to the States respectively and to the people."* . . . [B]y the necessary and proper measures to be concurrently and co-operatively taken, were meant measures known to the Constitution, particularly the ordinary control of the people and Legislatures of the States over the Government of the United States . . .Madison in letter to Edward Everett, 1830Virginia Resolution of 1798 nullifying Alien and Sedition Acts