Sturgeon's Law

One of my friends needs to find a poem for an event at a nonprofit she works for--it's basically a populist liberal political awareness organization. The poem is essentially supposed to be (A) somehow connected to patriotism, politics, social issues, or the nation, (B) uplifting and not overly extreme (i.e. acceptable to a mainstream benefit audience), and (C) still a good poem (I added that last requirement). So what poem should she use?