I’m not sure where they get this, but in an article about easy Dem pickups in the house we find this…
(Castle) has never received top-flight Democratic opposition in any of his re-election campaigns. In the unlikely chance he seeks re-election, though, Castle would face Democrat John Carney, a former lieutenant governor who narrowly lost a primary for governor in 2008.
Should Castle eschew a re-election campaign, potential Republican candidates for his seat include former state Sen. Charlie Copeland, who was the losing Republican nominee for lieutenant governor in 2008, and state Rep. Thomas H. Kovach, who won a special election last December.
What? No Protack?