(CNN) - Sen. Barack Obama responded Tuesday to the McCain campaign's efforts to link him to embattled community organizing group ACORN.
Watch: Obama on the economy, ACORN
"We've got the best voter registration, turnout, and volunteer operation in politics right and we don't need ACORN's help," Obama said Tuesday in Ohio.
The Illinois senator added that ACORN was not advising his campaign, and echoed campaign advisors who have increasingly accused the GOP of trying to suppress voter turnout as Election Day nears.
"What I want to make sure of, though, is that this is not used as an excuse for the kind of voter suppression tactics that we've seen in the past. Let's make sure everybody is voting, everybody is registered, everybody is doing this is a lawful way," he said.
The Democratic nominee's comments came the same day that his campaign held a conference call with reporters about the McCain campaign's recent focus on voter fraud.
Listen: Plouffe, Bauer on voting issues
Obama campaign manager David Plouffe and general counsel Bob Bauer accused Republicans of trying to intimidate voters and sow the seeds of confusion as the historic presidential election approaches.
"They seem to be setting up a strategy here to make it harder to vote," Obama campaign manager David Plouffe told reporters on a conference call. "To create a situation where voters don't have confidence in the system."
"They are going to try to raise questions. You know, cry out and raise questions about fraud and try and create a smokescreen out there to confuse voters and perhaps to give cover to some of the activities they're going to be undertaking over the next three weeks."
The Obama campaign also took issue with the McCain camp's recent efforts to link Obama to ACORN, whose voter registration efforts have come under increasing scrutiny in recent weeks. "We have our own registration effort," the Obama campaign's general counsel Bob Bauer said on the call. "We register our own voters under our own standards and we do so successfully."
Bauer also denied that the campaign ever paid Citizens Services, Inc., an entity affiliated with ACORN, to register voters. "We have never paid ACORN a penny for registration purposes," said Bauer.
The campaign's payments to Citizens Services, Inc. "were for canvassing in some of the larger primary states back in the spring – Ohio, Texas, Pennsylvania," Plouffe said. "It was to augment our grassroots organization."
Updated 4:09 pm to include Obama's comments in Ohio.