Ron Paul's son, Ronnie, to campaign for dad in Hawaii Rep. Ron Paul's middle son, Sen. Rand Paul (R-Ky.), has been an active campaigner for his father in the Republican presidential race. (AP Photo/Charlie Neibergall) Now, the Texas congressman's eldest son, Ronnie, is hitting the trail as well. In Hawaii. The eldest Paul son is a retired engineer, according to the New York Times, which profiled the Paul family in June 2010. He's expected to campaign for Paul, the libertarian-leaning congressman and GOP presidential contender, for five days in the run-up to the Aloha State's March 13 caucuses. The Hawaii swing appears to be the first time that Ronnie Paul will have stumped for his dad. He'll be joined on the trail by John Tate, Ron Paul's campaign manager. Paul's camp has made a point of working toward a strong showing in caucus states, which typically have lower turnout than primary states and give long-shot candidates such as Paul a better chance at winning delegates. Paul's enthusiastic supporters have also proven adept at mastering the often-complicated caucuses rules, which vary from state-to-state (for more on that, click here).