A controversy is brewing over bags of American flags left behind at the Democratic National Convention.

A worker at the INVESCO Field says he found trash bags full of American flags a day after Barack Obama's acceptance speech.

So he called the Republican Party who rescued the flags and used them at their McCain-Palin rally in Colorado Springs.

But workers for the Democratic Party say the bagged flags were being saved for use at a future event, and the flags were taken without permission.