the Left wing
the conservative party―the conservatives
the party out of office―the party out of power―the outs―the Opposition
the right wing―the right flank―of an army
the Liberal Party―the Liberals
the Constitutional Party―the Constitutionalists
the democratic party―(米国のは)―the Democrats
the Progressive Party―the Progressionists
the Imperialists
a Liberal
a person whose leftism is superficial
Russophilism.
the moderate party―the moderates
the revolutionists