When two is equivalent to one

“The United States is also a one-party state but, with typical American extravagance, they have two of them.”

“There is only one party in the United States, the Property Party…and it has two right wings: Republican and Democrat. Republicans are a bit stupider, more rigid, more doctrinaire in their laissez-faire capitalism than the Democrats, who are cuter, prettier, a bit more corrupt − until recently… and more willing than the Republicans to make small adjustments when the poor, the black, the anti-imperialists get out of hand. But, essentially, there is no difference between the two parties.”