People seem to have a lot of misconceptions about clones. Clones are just identical twins. You wouldn't be able to tell if someone is a clone, unless you see more than one of them.

I think the DS is brainwashing clones to be replacements for the elite, but think of the effort involved, you have to keep them from ever appearing together, the "backups" pretty much need to be in captivity for an entire lifetime in order for the DS to use the threat of replacement on the "real" one. And you only have a narrow window of time to do the cloning, or they'll be noticed as different ages. And after all that work you end up with light blue eyed Biden and black eyed Biden, if you look close you can tell, his ears are slightly different. They might as well have used make-up.