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Now, to one election oddity. In many states, people are already taking advantage of early voting, that's common. But in Iowa, people can ask to vote early in some unusual places.
Sandhya Dirks of Iowa Public Radio has this story about pop-up voting sites.
SANDHYA DIRKS, BYLINE: It's a bright autumn afternoon in a strip mall on the west side of Des Moines and families are stopping by La Tapatia Tienda Mexicana to get their weekly groceries. Mary Campos is sitting in her walker at the entrance.
MARY CAMPOS: Buenos dias.
DIRKS: She's here tonight to get shoppers to vote because today only this Latino grocery store has been transformed into a satellite polling place.
CAMPOS: You can go on in and vote right now.
DIRKS: It's literally one-stop shopping.
CAMPOS: People work, they have two jobs. And we don't know what it's going to be like on November 6. I've encouraged absentee ballots, but I think this is wonderful.
DIRKS: As Campos is talking, Ernesto Garcia walks out of the store. Garcia says he was worried about when and where to vote.
ERNESTO GARCIA: I'm a truck driver, so I don't know where I'm going to be able to go. And he says, well, there's going to be one at LaTapatia. I said, OK, I'll go there.
DIRKS: So in Iowa, all you need is 100 signatures to petition county officials for a satellite spot. The polling booth here was petitioned by the Obama campaign. Democrats are staging events to highlight pop-up voting. Just across the street, Latinos for Obama are having a noisy block party. Los Angeles Mayor Antonio Villaraigosa is here.
MAYOR ANTONIA VILLARAIGOSA: Today is a little rally to make sure that we all go and vote early. We've heard it: Oh, Villaraigosa, I forgot to vote, I was working. No, no, no, no. You can vote today. You can vote across the street, right?
DIRKS: The Democrats are also targeting college students. In just two weeks, they will have 53 pop-up polling booths on campuses across the state. Drake University political scientist Dennis Goldford says that's a savvy move.
DENNIS GOLDFORD: Because so much of the Democratic turnout is younger voters and minority voters who tend to be less likely to vote.
DIRKS: Tom Szold is with the Republican National Committee and he says the GOP has petitioned for satellite voting, too.
TOM SZOLD: We mostly put those in areas with low- to mid-propensity-GOP voters. So the type of people who lean to the right, but aren't necessarily the ones that are going to go out and make sure that they vote for the Republican candidates on Election Day.
DIRKS: Traditionally, Republicans win the turnout race on Election Day. But satellite voting isn't just about partisan politics. In a parking lot outside Legends Sports Bar in Marshalltown, there's a row of Harley-Davidsons, about five pickup trucks and a trailer emblazoned with a huge sign: vote here.
DAWN WILLIAMS: Start by filling in all the highlighted areas. And then when you get that, your address...
DIRKS: This is the first mobile voting booth in Iowa. This polling place on wheels was set up by County Auditor Dawn Williams. She borrowed a race car trailer, and they've have been parking it in front of a Hy-Vee grocery store, a bar, and a Wal-Mart.
WILLIAMS: We've caught lots of nontraditional voters. You can just tell when they come in that they're nontraditional. And I believe that should be the purpose for satellite voting.
DIRKS: Williams stops by the trailer to see how things are going. Like so many who voted here today, she says getting here was easy. She was on her way to shop at Wal-Mart anyway. For NPR News, I'm Sandhya Dirks in Des Moines, Iowa.
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You are listening to ALL THINGS CONSIDERED. Transcript provided by NPR, Copyright National Public Radio.