To be fair, the entire quote in context makes it clear that she was actually saying that you don't need voting papers in order to participate in the campaign effort. I.e., you may not be able to vote, but you can still get involved in "get out the vote" activities, you can still staff a voter registration booth, etc.
The phrasing she used was unfortunate, but I strongly recommend vilifying politicians based on the really stupid things they say, not the perfectly reasonable things that sound stupid when taken out of context.
I hate it when the opposition perpetrates out-of-context shenanigans on me, but I'm always embarrassed and ashamed when I see the same shenanigans being perpetrated against the opposition.