McCain and Obama hit key states

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The rival candidates for the US presidential election have begun their final week of campaigning with rallies in the key state of Pennsylvania, reports BBC.
Republican John McCain and his running mate Sarah Palin said they would surprise pundits by winning the state.
Democrat Barack Obama told supporters in Chester that it was "time to come together" as Americans.
The latest opinion polls suggest Mr Obama is still ahead but by a slightly smaller margin than last week.
While Senator McCain and Mrs Palin both appeared in Hershey, a conservative town, two other rallies at Allentown and Quakertown had to be cancelled because of bad weather.
It was the running mates' first appearance together since reports of infighting within the Republican camp.
Mr McCain, 72, said: "When two mavericks join up they don't agree on everything but that's a lot of fun."
The Arizona senator then went to North Carolina, a state which has not voted Democrat since 1976, but where Mr McCain and Mr Obama are now neck-and-neck in the polls.
Alaska Governor Palin, 44, stayed in Pennsylvania for other rallies.
Illinois Senator Obama, 47, went on to campaign in Virginia, which has not voted Democrat since 1964, but where the race is also tight.
Opinion polls show a healthy lead for Mr Obama in Pennsylvania but Mr McCain sees the industrial state - with its disaffected white working-class voters - as a key target on the road to the White House.
The Republican repeated his promise to "clean up Washington", saying that his running mate would "show them what reform is all about".
And Mr McCain said professional pollsters were wrong about Mr Obama's lead in the Rust Belt state.
Cannot play media.You do not have the correct version of the flash player. Download the correct versionJohn McCain attacks Barack Obama's economic plans
"It's wonderful to fool the pundits, we're going to win in the state of Pennsylvania," said Mr McCain.
McCain advisors have been suggesting the race in some battleground states may be closer than it seems, says the BBC's North America editor Justin Webb, on the campaign trail in Pennsylvania.
Mrs Palin said Mr Obama had not been candid with voters about his tax plans.
"It doesn't sound like too many of you are supporting Barack the wealth spreader," she said.
She was briefly booed by some in the crowd who appeared to support Mr Obama.
Meanwhile, in Chester, Pennsylvania, Mr Obama spoke to a crowd of about 9,000 people who braved cold and rain to attend an outdoor rally.
He repeated his campaign pledge that taxes would not be raised on Americans who earn under $250,000 and once again asserted that Mr McCain would continue the economic policies of unpopular incumbent George W Bush.
"John McCain has ridden shotgun as George Bush has driven our economy toward a cliff, and now he wants to take the wheel and step on the gas."
He closed by saying it was "time to come together" as Americans.
The BBC's Kevin Connolly in Washington says with seven days to go, the problems for Mr McCain remain pretty much as they have been all along.
He is the first Republican in many years to find himself outgunned financially and outmuscled on the ground, our correspondent says.
Meanwhile: US presidential candidates John McCain and Barack Obama are both heading to the key state of Florida to campaign.
Mr McCain is expected to make a national security statement after meeting former top military officers.
Mr Obama will hold his first rally with former President Bill Clinton and blitz the airwaves with a half-hour, prime-time advert on US networks.
Six days from the 4 November election, Senator Obama leads in national and most swing-state opinion polls.
Mr McCain's briefing with former senior military officers will come amid a day of campaigning in Florida, which voted Republican in the past two elections but where polls now give Mr Obama the edge.
The Arizona senator will outline his views on security threats to the nation and argue that his background as a former US Navy pilot means he is better prepared than Senator Obama to be commander-in-chief.
A campaign adviser said the "infomercial" being shown on major networks would cut live to Mr Obama at the Florida rally.
The half-hour spot will be shown on CBS, Fox and NBC, at a cost of about $1m (£630,000) per network, as well as on Spanish language channel Univision, BET, MSNBC and TV One.
The BBC's Justin Webb in Washington says that while it is not unheard of for American politicians to buy large chunks of television time - millionaire Ross Perot did it in 1992 - Mr Obama's move is unprecedented in its scope.
Only one of the major TV networks, ABC, is not running the film - which has been weeks in the making - and Fox News has arranged for the start of the fifth game of the baseball World Series to be delayed to accommodate it.