<p>Sen. Arlen Specter eked out a narrow win over Rep. Patrick J. Toomey in yesterday's Republican primary for Pennsylvania's Senate seat — the most contentious Senate primary challenge for either party this year.</p>
<p>With 96 percent of precincts reporting in unofficial returns, Mr. Specter led with 51 percent, or 499,731 votes, to Mr. Toomey's 49 percent, or 483,626 votes. The Associated Press called the race for Mr. Specter at about 12:15 this morning.</p>