Wiktionary
antirepublican
a. Opposing the formation of a republic. n. One who opposes the formation of a republic.
Usage examples of "antirepublican".
One of the most distinguished of my predecessors attached deserved importance to "the support of the State governments in all their rights, as the most competent administration for our domestic concerns and the surest bulwark against antirepublican tendencies," and to the "preservation of the General Government in its whole constitutional vigor, as the sheet anchor of our peace at home and safety abroad.