Trey Grayson, Kentucky’s secretary of state, is trailing in polls behind physician Rand Paul (Ron Paul’s son) in the Bluegrass State’s GOP Senate primary. To try and generate some momentum, Grayson is putting his chips on national security, noting that such a strategy was “effective” for Sen. Scott Brown (R., Mass.) earlier this year. “This is the issue in Republican primaries,” he says.

This week, Grayson released a new web video calling Paul’s foreign-policy ideas “strange.” He then followed up with this website: RandPaulStrangeIdeas.com. “Rand is a lot slicker than his dad,” Grayson says. “He tries to avoid talking about national security, but it’s a weak issue for him. He lies about his views.” Grayson points to Paul’s stances on Gitmo, Iraq, and Afghanistan as examples.

While ready to hammer Paul the younger on national security, Grayson says he’s not entirely against the Paul-family brand of libertarian politics. Paul’s father, a Texas congressman and former presidential candidate, “is pretty accurate on economic stuff,” he says. Nonetheless, he still calls Rand “a radical.”

Paul, for his part, has been endorsed by Sarah Palin, Steve Forbes, and Dick Armey. He has also hit back at Grayson’s charges.