"The president, more or less, seemed like he was back on the campaign trail," Maer said. "It really is a campaign here, a campaign for European public opinion."
He added that "cooperation" has been a major theme of Obama's trip, both during his town hall and the G20 meetings in London.
Click here to see the whole interview from France:
Click here to watch this week's episode of Washington Unplugged, including Arianna Huffington, an interview with the U.S.'s first Muslim congressman and a feature on people with tattoos of President Obama.