Things I Learned Today About Joe The Plumber. Posted on October 16, 2008 by nhawthorne Reply 1. His name is not Joe. 2. He is not registered to be a plumber. 3. He is a registered Republican and voted in the primaries. (Not. Exactly. Undecided.) 4. He is related to Charles Keating. 5. He owes a lot of back taxes. Tip o’ the Hat to New York Times Caucus blog.