Washington (CNN) – In between campaign stops, Mitt Romney Thursday joined a conference call to thank his campaign's major financial boosters, CNN has learned.
Speaking to members of the campaign's national finance committee, Romney acknowledged the work they did over the past two years helping to raise over $800 million for the campaign and the joint Republican victory effort and said he wasn't sure how to show his appreciation besides telling them, according to one of the participants.
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The effort by these donors and bundlers was critical in helping to keep Romney competitive financially. He is the first Republican nominee not to accept federal matching funds for the general election. Because of that decision Romney has been able to spend hundreds of millions of dollars on campaign ads in the general election and not have to abide by strict spending limits.
He told these key backers the enthusiasm he sees on the campaign trail is helping to keep him motivated in the closing days noting the large turnouts and fired up crowds.
He vowed to have a very aggressive travel schedule over the next four days saying he would be visiting most of the major battlegrounds.
Before he joined the call the campaign finance chairman Spencer Zwick and pollster Neil Newhouse briefed the participants, who gave at least $50,000 to the campaign or raised at least $250,000. Zwick said the campaign is fully-funded and thanks to their efforts they have had the needed resources.
Newhouse said the campaign is still going with its previously outlined 3-2-1 strategy: take back the 3 historically Republican states (Indiana, North Carolina and Virginia); win the 2 key battlegrounds of Ohio and Florida and then capture at least one other key battleground (possibilities include Colorado, Nevada, Wisconsin or New Hampshire). He said he believes the campaign is very competitive in Wisconsin and Virginia.
He tried to reassure these donors and bundlers saying Romney is mostly tied in many of these battlegrounds. While President Obama has a lead in many states it is often within the polls sampling error, he said. Also he pointed to how nationally Romney is doing better with independents than the president.
Campaign officials discussed how they are spending money now in Minnesota and Pennsylvania.
There is increased attention in these closing days to Pennsylvania. A Franklin & Marshall poll released Wednesday shows the president leading Romney 49% to 45% down from a 9 point lead Obama enjoyed in September.
Some additional supporters are traveling to Pennsylvania to beef up the campaign's presence there. As of Wednesday evening, the Romney campaign has bought $1 million worth of television time in the state for ads to run between now and Election Day and is running radio ads there as well.
Obama campaign officials say they believe they will win in Pennsylvania but will not cede any ground to Republicans. To counter Romney and increased buys by Republican super PACs, Obama has bought $1.4 million with of ad time there as well.
–Follow Kevin Bohn on Twitter @KevinBohnCNN