If you need any indication about how tough a primary Trey Grayson is in, check out his first ad.

The Kentucky secretary of state is up with the first offering of his GOP Senate primary with Rand Paul, and he skips straight over the bio ads in favor of an attack ad.

His first ad is aimed squarely at his opponent, featuring a clip of Paul speaking out against coal, which Grayson uses to tie him to "Obama's war on coal."

It's a pretty strong ad, given the impact of coal in Kentucky, but Grayson is going negative very early, with nearly three months to go.