Wonder where they found the flags?
Maybe they raided a local boy scout HQ.
For decades (50-70s), my troop had the city concession for putting up flags on the city streets in front of businesses who were on a subscription basis.
Although we replaced the ones that were truly getting "well-worn," most flags showed some aging, as they, too, were veteran attestations to our unique American heritage.
I suspect the Obama campaign has no more kept a supply of flags near at hand than it has a supply of American flag lapel pins.
HF