The next time you hear a fellow American bemoaning the lack of Washington bipartisanship, tell him to cheer up. There is one issue on which Congress still resoundingly agrees: gun rights. Bear that in mind, too, the next time you read a story about the "new" political debate over gun control.

An almost cosmic disconnect has been building in the political sphere since the tragedy of Sandy Hook. On the one side is the gun-control community, which sniffed a rare political opening and is determined to use it to the max....