The number of Twitter followers may have some intrinsic value in politics, and Republican Sen. John McCain of Arizona seems to be no exception to this rule. McCain tweeted Monday morning asking for assistance in gathering more followers to become one of the few sitting senators with at least three million followers. "We're only 74 Twitter followers away from 3M - spread the word & help us reach this big milestone!," McCain's tweet said. McCain's tweet seemed to have the opposite effect — he began steadily losing followers. As of this writing, McCain has 2,989,328, a big deficit from the...