Boston (CNN) - As Mitt Romney headed into another session of debate preparations in Boston, his advisers said the nominee still had time to convince swing voters to support him.
In the final five weeks of the election, Romney will seek to appeal to voters on a range of issues, including taxes and spending, job growth, small business growth, health care, energy and foreign policy.
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"As we move closer to Election Day, we believe the critical choice that is before voters is becoming more clear and more apparent," senior adviser Kevin Madden told reporters on a conference call. "We can't afford another four years like the last four years."
Campaign advisers have said they expect the race to be close fought until November, with Romney making a play in these final weeks for undecided voters and for those who have some level of support for Obama but might be persuaded to switch to Romney.
"I think the reason these voters are undecided is because they've watched President Obama for the four years and they haven't concluded that he's worthy of their support right now," Madden said, adding Romney's job was: "to lay out the important contrast, the important choice that these voters face on these issues that they care about."
The GOP presidential nominee will have another opportunity to break through to undecided voters when he faces off against President Obama Wednesday in the first of three highly-anticipated debates.
Romney spent time the past two days prepping for Wednesday night, and will practice more in Denver in the coming days.
He said he relishes the chance to confront the president head-on.
"I'm looking forward to the debates, I'll put it that way," Romney told reporters on his campaign plane Friday.
One topic he will be prepared to discuss is the covertly-filmed fund-raiser video, in which Romney told donors 47% of Americans were dependent on government and would not vote for him.
Senior adviser Ed Gillespie said Romney - who has since said publicly he would be a president for "the 100% - would be ready.
"We wouldn't be surprised obviously if that came up in the debate, and the governor is prepared obviously to respond to that," Gillespie.