Republican presidential candidate John McCain is vowing to catch up to Democrat Barack Obama in states critical to winning the White House in four days.
Senator McCain is spending a second day inOhio, where today (Friday) he told voters his campaign is "coming back strong." Polls show that Senator Obama is leading in Ohio and other key states. No Republican has ever won the White House without winning Ohio.
The Arizona senator claimed Obama would raise taxes and make a bad economy even worse.But inIowa, Obama accused his rival of resorting to "slash and burn" politics to get elected.
The Illinois senator also accused McCain of offering what he called the "same worn out" economic policies of the unpopular incumbent president, Republican George Bush.
Obama is also campaigning in Indiana.
The latest polls show the race is very tight in that state, which is usually reliably Republican.
Support in Iowa has shifted between both parties, but the latest surveys show Obama currently holds a significant lead there.