NPR:

When Barack Obama took the stage in DeMoines to deliver his impassioned Iowa caucus victory speech, U2’s song "City of Blinding Lights" preceded him. On the same night, John Edwards’ address to his supporters was also paired with a U2 song, "In The Name of Love?" Since when has U2 become the band to sum up American sentiment? Or is it just that they are one of the biggest band in the world and summing up the zeitgeist is part of their job?

I don’t know, but at least it’s not "Don’t Stop" or "Born In The USA".