The official word out of the 2004 Democratic convention was that things were going to be positive, upbeat, and optimistic, putting a new face on a party that's become known for negativity and "Bush hatred."
In reality, the convention was less positive than simply defensive. The endless repetitions of "strong" in its various permutations were designed to rebut a lingering public perception (fostered by decades of spurious Republican attacks: the much-maligned George McGovern, after all, was right about the Vietnam War, as Nixon's subsequent decision to surrender shows) of the party as weak. Flags were everywhere, as were chants of "U! S! A!" and elaborate efforts to demonstrate that, yes, Democrats are Americans, too.