John Edwards was corrected by his own campaign yesterday after he mistakenly said he read the classified version of the 2002 National Intelligence Estimate on Iraq prior to voting to authorize the use of force in Iraq. The New York Times' Patrick Healy and Marc Santora report that the Edwards campaign said in fact he read only a declassified version. Sens. Chris Dodd and Hillary Clinton "were briefed on the estimate only by aides or administration officials, their advisers say."

Edwards was in Silicon Valley, Cali., yesterday when he answered the question. During his stops there, Edwards called for a federal investigation into possible antitrust violations by oil companies and spoke out against subsidies for the oil industry. Edwards also said he would force oil companies to put ethanol pumps in a quarter of their gas stations and require all new cars made after 2010 able to use ethanol-blended gasoline.

The New York Sun's Josh Gerstein reports that Clinton was also in the high-tech region where she presented her "innovation agenda" that would help tech companies by making "permanent a research and development tax credit that is currently renewed on a rolling basis, leading to uncertainty for many firms." Clinton said she'd spend $50 billion on government projects to lower petroleum consumption and said tech companies may need to seek a stand-alone measure to increase the number of visas for overseas workers as the immigration compromise dithers.

Obama also pushed for more regulation in Nevada where he said he'd restore environmental protections rolled back by the Bush administration. Obama also said he can compete among rural Nevadans as he did in southern Illinois in 2004.

However, campaigning is more than showing up and Obama "must gather caucus-goers and get them to schools, community centers and other caucus sites to declare their support, often in the face of opposition," writes the Las Vegas Sun's J. Patrick Coolican. "The process puts a premium on organizational strength from the ground up. Thus far Obama's Nevada campaign has been largely top down and media-driven." Obama worked politically-active figures yesterday and will speak to Culinary Union workers today. "The Clinton family, however, is a political machine unto itself, and they are rapidly setting up shop in Nevada. The question for Obama is whether he can match it."

Key endorsements for Edwards, Obama and Clinton in Florida will be found from three uncommitted Democrats, writes the Washington Post's Chris Cillizza: Former Sen. Bob Graham "remains a powerful force in Florida politics," an iconic figure in the state party who's served in the state House, U.S. House and Senate; U.S. Rep. Kendrick Meek has "real-world experience in state-wide campaigns" after pushing a successful 2002 ballot measure and serving as John Kerry's state campaign chair; and Florida Chief Financial Officer Alex Sink is the "lone statewide elected Democrat in the state after Sen. Bill Nelson, and as such is the titular head of the party." Sink's power is more than symbolic as her husband was the Democratic gubernatorial nominee in 2002.

In South Carolina, Rudy Giuliani leads his party for the Republican nomination in a new poll, but that slim lead has "potential land mines" buried in it, writes The State's Aaron Gould Sheinin. More than 44 percent said knowing a candidate has had multiple divorces would make them less likely to support that candidate. Giuliani has been married three times. Sixty-two percent said they're pro-life and a majority of respondents said they'd have trouble voting for a candidate with a different abortion position than themselves. About thirty percent of Republicans and independents (who can vote in the GOP primary) said they were undecided. Meanwhile, John McCain lost two grassroots organizers (one was fired) in South Carolina yesterday.

Lastly, the GOP is expanding its African-American ranks with new Congressional challengers, reports The Politico's Josh Kraushaar. However, that expansion is coming from the grassroots level, rather than the national level. Kentucky lawyer Erwin Roberts is challenging Rep. John Yarmuth (D-03) and Army Lt. Col. Allen West is looking to challenge former Navy pilot Marc Flagg for the GOP nomination to face Rep. Ron Klein (D-22). Former Pennsylvania gubernatorial nominee and Steelers wide receiver Lynn Swann may challenge Rep. Jason Altmire (D-04).

Get these and today's other elections stories at RCP's Politics and Elections page.