Barack Obama hit back at rival Hillary Clinton on Saturday before a Wisconsin showdown next Tuesday in their Democratic presidential battle, as Clinton headed to the state for the first time.

Obama, a first-term Illinois senator, has beaten Clinton in the last eight state contests to gain the upper hand in their duel to become the Democratic presidential nominee in November’s election.

Obama has spent four days in Wisconsin since his last round of victories last Tuesday, while Clinton has focused on March 4 votes in Ohio and Texas hoping victories there will rejuvenate her flagging campaign.

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