Rapper Shawn Carter, better known as Jay-Z, has a long record of being a supporter of Democratic and liberal causes. In fact, he was one of many celebrity left-wingers who were invited to President Obama's lavish $40,000 birthday celebration . When it comes to his own affairs, Carter is like many Hollywood liberals in being unwilling to put his money where his mouth is. Right now, he's engaged in a prolonged confrontation with a carpenter's union for using non-union workers to perform rennovations on a New York City club he owns. The union thugs are playing to type as well, parading around giant inflatable rats and calling Carter's employees racist terms .