New York Sen. Charles Schumer (D-NY), the third-highest ranking member of the Senate Democratic caucus, is emerging as the key figure in the congressional battle over the Iran deal. Schumer, who has maintained a tight silence since the nuclear deal was announced two weeks ago, was the most frequent target of last week’s rally against the deal in Times Square. Activists say a “no” vote from Schumer will not be enough; they want him to rally others to override President Barack Obama’s anticipated veto. Supporters of the deal are also lobbying him, hard. Yet the deal, by Schumer’s own standards,
