Karen Hartley-Nagle has the inside track. She has lined up the Democratic Party (more or less) and been recognized by some unions. She has been keeping an awfully low profile though and may (or may not) have fundraising problems. KHN: 44%
Jerry Northington has been raising some money online due to his longstanding connection to Daily Kos and scored the Progressive Dems endorsment in a walk when KHN decided not to compete for it. Other than that and his willingness to lend his campaign a few bucks, he seems like a one dimensional anti-war candiate. JN: 30%
Mike Miller is the wild card. He won this thing a few elections ago, so if the city of Wilmington turns out, he might earn the distinction of losing to Mike Castle twice. MM: ??