In addition, radio host Rush Limbaugh suggested today that Obama's race may have played a part in Powell's endorsement. Powell denied race had any connection, but did say Obama's election would be historic.
At his rally in Fayetteville, part of his campaign swing through traditionally Republican-leaning states, Obama worked to incorporate Powell into the themes of his stump speech.
"He knows, as we do, that this is a moment where we all need to come together as one nation -- young and old, rich and poor, black and white, Republican and Democrat," Obama said.
He invoked Powell's name when defending himself against some of the attacks coming lately from the McCain campaign.
"He reminded us that at this defining moment, we don't have the luxury of relying on the same political games, the same political tactics that are used every election to divide us from one another and make us afraid of one another," Obama said.
Specifically, Obama tried to parry the new charge from the McCain team, that his tax plan amounts to socialism.
"Socialism!" scoffed Obama to a booing crowd, "it's kind of hard to figure how Warren Buffet endorsed me, Colin Powell endorses me, and John McCain thinks I'm passing socialism."
While Obama largely stuck to his stump speech, he did pounce on some recent gaffes by the McCain campaign.
Saturday, a McCain surrogate suggested Northern Virginia is not "Real Virginia," and Gov. Sarah Palin, McCain's vice presidential pick, has commented on visiting pro-America parts of the country.
"There are no real or fake parts of this country," Obama said today. "We are not separated by the pro-America and anti-America parts of this nation. We all love this country, no matter where we live or where we come from."
But though he leads in polls nationally and in key states, evidently not everyone loves Obama.
Stopping for food at Cape Fear BBQ and Chicken in Fayetteville, Obama was greeted by a 54-year-old woman shouting, "Socialist! Socialist! Socialist! Get out of here!"
The woman, Diane Fanning, who works at a Sam's Club, was among the older and largely white crowd eating lunch after church services.
Sitting next to Fanning, Lenox Bramble, 76, gave her an angry look.
"Be civil, be courteous," he said.
Bramble later told a reporter he's voting for Sen. John McCain, R-Ariz., and doesn't think Obama has enough experience.
Another diner, Cecilia Hayslip, 61, yelled back at Fanning, "At least he's not a war-monger!"
Obama came to the long table where Fanning was eating with fellow congregants from the local First Presbyterian church.
Obama held out his hand to her.
"How are you, ma'am?" he asked.
She refused to shake his hand.
Obama spoke with other, friendlier members of the congregation about health care, Social Security and taxes.
Fanning explained their courtesy to a reporter, saying, "Some of 'em are just nicer than I am. I know how some of 'em think."
The reception in Republican-leaning diner was decidedly mixed.
"You're doing a great job," said Betty Waylett, 76, a Republican who said she plans to vote for Obama.
Pastor Randal Bremer, also at the table, said Obama told him, "Whether you vote for me or not I'll need your prayers."