These are the best numbers yet for Beau in a head-to-head against Castle. Back in March, Public Policy Polling had Castle up by 8 points, and a debatable Susquehanna Research poll from May had Biden trailing by 21 points.
Biden's back from Iraq, and everyone -- Castle, included, it seems -- is waiting for him to make the first move. There have been some mixed signals out of Delaware on Biden's intentions, but the overwhelming sentiment is that he'll jump into the race soon. So what'll it be for Castle: retiring to catch some rays in Florida or jumping into a Senate campaign?