It’s still unclear whether former Hewlett Packard CEO Carly Fiorina ultimately will challenge Barbara Boxer in next year’s Senate election, but the California Democrat isn’t waiting to get her campaign started.

In fact, Boxer already has found a way to make the race interesting: She’s asking the public to pick the design for her 2010 Senate campaign poster.

Boxer’s campaign sent a letter to supporters last month asking them to submit their own poster design ideas. More than 200 submissions were received and 12 finalists were chosen.

Channeling Secretary of State Hillary Rodham Clinton — who, as a candidate for president, asked the public to go online to vote for her campaign song — Boxer is now asking supporters to visit her campaign Web site and pick their favorite poster design.

There’s a wide variety of artwork to choose from, with most playing up the boxing aspect of the Senator’s last name.

One submission evokes vintage boxing posters (labeled “Always In Your Corner, Fighting For Your Rights—), while two feature boxing gloves with the slogans “Fighting For You— and “Lace em up.—

Perhaps not surprisingly, many of the featured posters play off the iconic art of the 2008 presidential campaign — a Shepard Fairey-like design features Boxer’s image with the word “champion,— for example.

Then there’s finalist No. 3, which features an image of Boxer in front of an outline of California. “If California had a mother,— the poster reads. “It would be Barbara.—

Vote now, and vote often: The online polls will close at midnight on Tuesday.

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