FACTBOX: Presidential rivals McCain, Obama and Clinton

(Reuters) - For the first time since Democrat John Kennedy of Massachusetts won the job in 1960, a member of the U.S. Senate will be elected in November as U.S. president.

Sen. John McCain of Arizona wrapped up the Republican presidential nomination on Tuesday, while Sen. Barack Obama of Illinois kept his lead over hard-charging Sen. Hillary Clinton of New York in the battle for the Democratic nomination.

Here are some facts about the three candidates:

* McCain, who turns 72 in August, would be the oldest person to take office as a first-term U.S. president.

* Obama, who turns 47 in August, would be the first black U.S. president as well as one of the youngest.

* Clinton, who turns 61 in October, is the wife of former President Bill Clinton and would be the first female U.S. president.

* Obama, a former Illinois state legislator, was elected to the Senate in 2004, four years after Clinton became the first former first lady to win a seat in the chamber; McCain, a former Navy fighter pilot and prisoner of war in Vietnam, was elected to the Senate in 1986, after four years in the House of Representatives.

* McCain has accused Obama of being naive in opposing the Iraq war; Obama has charged that McCain was reckless in helping President George W. Bush get the United States into a war now in its sixth year. Clinton approved a resolution authorizing the U.S.-led invasion of Iraq but has since become an outspoken critic of the war.

* McCain opposed tax cuts Bush got through Congress in his first term, saying they favored the rich. But he now backs extending the tax relief, saying to let the cuts expire after 2010 would amount to a tax hike. Obama and Clinton back extending tax cuts for the middle-class but not the wealthy.

* McCain has amassed a record of legislative achievement, including a landmark bill to tighten controls on campaign financing, a signature issue. He also helped lead the charge to normalize trade relations with former foe Vietnam.

* As relative newcomers to the Senate, Clinton and Obama have far shorter records of accomplishments. Yet Clinton has been a leading voice on health care, while Obama helped lead a charge to tighten ethics rules in the scandal-hit Congress.

* McCain, Obama and Clinton have backed efforts to aggressively address global warming and have criticized the Bush administration's inaction.

(Compiled by Thomas Ferraro in Washington; Editing by John O'Callaghan)