U.S. Sen. Rand Paul will address the Rotary Club today amid a heated campaign season, with a closely contested presidential race and a heated race for U.S. Senate just north in Indiana.Paul, a Republican elected in 2010, is scheduled to speak at 12:15 p.m. at the Galt House and will be available to speak to the media after the event, his office said. WFPL's Phillip M. Bailey will be there.