What battery powered car can go the farthest on one charge? How far will it go on one charge?

What battery powered car can go the farthest on one charge? How far will it go on one charge? Somebody was making fun of John McCain (one of the Republican presidential candidates) for saying he thinks we can have an electric car (battery powered) that goes 100 miles on one charge by the election. Just from my imperfect memory, I though battery powered cars could already do that. Am I right, or was I fantasizing?