Colorado is a state that tends to weigh heavier on the Republican side. If the state goes blue this election, it would be just the second time in 50 years.
With John McCain coming to Colorado just two days after the big convention, it looks like the Senator knows what's on the line.
McCain’s visit to Colorado Springs was just his second stop after accepting his parties nomination in Minneapolis St. Paul.
"Let there be no doubt my friends, we're going to win this election. We're going win it right here in Colorado," said McCain in front of thousands of supporters at the Jet Center in Colorado SPrings.
Two weeks ago, Senator Barack Obama wowed more than 80 thousand Democratic supporters at Invesco Field At Mile High in Denver.
Obama is confident he can take Colorado.
McCain's stop in the Springs, may be a way of fighting back.
"I think you're going to see both the Republicans and Democrats campaigning extensively in the battleground states," said Colorado Springs Democrat John Morse.
Senator Obama continues to community organize, something the Republicans have been using against him. But his party's efforts have changed things in Colorado
In June and July, Democrats registered over 13 thousand new voters; three times that of the Republicans.
But Republicans still hold the largest voting bloc in the state with 1,024,500, with unaffiliated voters close behind.