What would you think if a candidate were allowed to orchestrate the transportation of thousands of voters to go state to state to state.. and vote in each primary. Each person casting a vote in Iowa, Wyoming, New Hampshire, etc...?
Voter fraud, right? Nope, not technically. States each have their own registration process for the primaries and many have no residency requirement and many allow you to register on election day.
http://www.infoplease.com/ipa/A0781452.html
This AP article explains in more detail.
ABC News: Ease of Iowa, N.H. Voting Raises Eyebrows
So how much of this is really happening? Certainly it would be easy to get away with as each state primary is run as an independent entity and there is no reconciliation of voters between states.
Some states would not allow this to happen. My state of Illinois, for example has a 30 day residence requirement. So I can only vote once here and know that I am just voting alongside my fellow Illinoisans. But on the flipside, I could have gone to Iowa, put down the address of the hotel I was staying in and registered for the caucuses. Then I could have gone to New Hampshire on Monday and put down the address of my hotel explaining that I was going to move there permanently soon. Then I cast my NH ballot. and so on and so on.
Tell me this isn't a gigantic loophole in the primary process. Tell me that the candidates would not exploit this loophole.
I know better... the only question is who is abusing it and to what extent?