John McCain clinches Republican nomination
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Pivotal primaries

Sen. John McCain and his wife, Cindy, greet supporters Tuesday at his election-night party in Dallas. “We have won enough delegates to claim with confidence, humility and a great sense of responsibility that I will be the Republican nominee,” he said. McCain, who swept Tuesday’s four primaries, will visit the White House today to receive the endorsement of President Bush. (Larry W. Smith / EPA)
Going into Tuesday’s balloting, political analysts expected a highly contested race in Ohio. Instead, Sen. Hillary Rodham Clinton defeated Sen. Barack Obama decisively. Their next key battle is in seven weeks in Pennsylvania. (Carolyn Cole / Los Angeles Times)
Sen. Barack Obama could still end up winning the delegate race in Texas because of caucus rules. (Bob Pearson / EPA)
Sen. Hillary Clinton celebrates her win at the Columbus Atheneum auditorium in downtown Columbus, Ohio. (Carolyn Cole / Los Angles times)
Republican presidential hopeful Sen. John McCain, R-Ariz. and his wife Cindy react as Fox News declares he has won enough delegates to be named the Republican presidential nominee in his hotel suite in Dallas, Texas. (Stephan Savoia / Associated Press)
Democratic presidential hopeful Sen. Barack Obama, D-Ill., left, is joined by wife Michelle during a primary night rally in San Antonio, Texas. (Eric Gay / Associated Press)
Ginger Haack tries to get in some knitting while waiting for voters to arrive at a polling station in Columbus, Ohio, on Tuesday. “We’ve been busy. I haven’t gotten too much done,” she said. (Carolyn Cole / Los Angeles Times)
Selectman Keith Terry fills out some paperwork at a polling station in Plainfield, Vt., on Tuesday. Elections officials are expecting a heavy turnout in the Vermont primary, as the Democrats try to pinpoint their presidential nominee. (Toby Talbot / Associated Press)
Arizona Sen. John McCain, right, and his wife, Cindy, make a campaign stop at the Mi Terra Restaurant in San Antonio on Tuesday. With enough votes, McCain could secure the GOP presidential nomination today. (Gerald Herbert / Associated Press)
Democratic presidential hopeful Hillary Rodham Clinton campaigns at Herrera’s Mexican Cafe in Dallas on Tuesday. Next to the New York senator are Pauline Madrano and Rob Reiner. (Carolyn Kaster / Associated Press)
Presidential candidate Barack Obama (D-Ill.) and his wife, Michelle, pose on Tuesday with Houston police officers before boarding his campaign plane for San Antonio. (Win McNamee / Getty Images)