As Robert Novak noted today, voters could find it difficult to get a read on Barack Obama’s real feelings about the rights of gun owners and the constitutionality of gun bans. Obama has certainly made his position opaque with a number of contradictory statements in this campaign. Perhaps the tribulations of Hale DeMar and the legislative response to an act of self-defense can help make Obama’s impulses a little more transparent. Hale DeMar confronted a burglar in his home in December 2003 and shot him twice, forcing the burglar to flee and to seek medical care. Police arrested Mario Billings...