Maybe I’m thick, but it sure comes across as a tongue in cheek joke to me. I think they are poking fun at the 1 in 4 Americans that thinks the sun revolves around the earth (urban Democrats with ObamaPhones).
I agree; below is Groupon's explanation of the discount code which makes it seem even more like a joke:
As a young store clerk, Honest Abe once walked 18 miles to return 7¢ to a customer whose wallet was eaten by a bear, so what better way to celebrate President's Day than with some savings? For a limited time, you can buy a Local deal and receive a $10 discount off your purchase of $40 or more! Just enter the promo code 10OFF40LOCAL at checkout.