 His public appearance came at the Republican Convention in Milwaukee Monday. Singer Lee Greenwood performed God Bless the USA and talked to NCN News about the performance. And although he will walk out to my song if it's on a recording, what you may not know is the band that played there in the interim between speakers, they all used to work for me for 10 years. They're called Six Wire. Greenwood's song is regularly played at Republican political events.