Poll shows Paul, Mongiardo have strong leadsThe Associated PressLOUISVILLE, Ky. -- Republican Rand Paul and Democrat Dan Mongiardo have strong leads in their U.S. Senate primary campaigns, according to a new statewide poll.The Courier-Journal/WHAS-11 Bluegrass Poll found Paul, a Bowling Green doctor, leads Secretary of State Trey Grayson 42 percent to 27 percent in the GOP race. Mongiardo, the state's lieutenant governor, leads Attorney General Conway by a similar wide margin, 45 to 27 percent.Undecided voters were at 19 percent in both polls.The Republican poll had a margin of error of 4.7 percentage points and the Democrat poll's margin is...