FILE- In this Dec. 5, 2017, file photo, former President Barack Obama address the participants at a summit on climate change involving mayors from around the globe in Chicago. A Democratic group backed by former President Barack Obama plans to invest millions of dollars in state-level elections in a dozen states this year, with its heaviest focus on Ohio.
FILE- In this Dec. 5, 2017, file photo, former President Barack Obama address the participants at a summit on climate change involving mayors from around the globe in Chicago. A Democratic group backed by former President Barack Obama plans to invest millions of dollars in state-level elections in a dozen states this year, with its heaviest focus on Ohio. Charles Rex Arbogast, File AP Photo
FILE- In this Dec. 5, 2017, file photo, former President Barack Obama address the participants at a summit on climate change involving mayors from around the globe in Chicago. A Democratic group backed by former President Barack Obama plans to invest millions of dollars in state-level elections in a dozen states this year, with its heaviest focus on Ohio. Charles Rex Arbogast, File AP Photo

Obama-backed committee targeting races in 11 states

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