Mitt Romney will join forces with a former top adviser to President Obama, David Axelrod, this summer.

"Mitt Romney this morning announced a series of high-profile speakers who will address a retreat that the former Republican presidential nominee is putting together in June," the Boston Globe reports.

"The list of speakers includes some surprising names, including David Axelrod, one the masterminds behind President Obama’s campaign to defeat Romney last year. At various points during the campaign, Axelrod accused Romney of being secretive, dishonest, and 'living on a different planet.'"

It is widely believed that Axelrod was intrumental in defeating Romney's bid to be president of the United States.

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