In the end, Rep. Anthony Weiner stood alone, where he has always wanted to be — in the glare of the national media spotlight. And though he didn’t say it at a Thursday news conference in New York, he hinted he may at some point be back. The night before, away from the crush of the media and the company of colleagues who were partying at the annual White House congressional picnic, Weiner called fellow New York Democrat Steve Israel, who handles campaign politics for House Democrats. Israel, who had attended Weiner’s wedding last July, handed the phone to Minority...