Clinton campaign officials have accused Democratic rival Barack Obama of making a 'flub' during an Ohio speech in which he described the Iraq war vote cast by a leading senator who endorsed him.

Obama criticized Clinton expressly for failing to read the classified National Intelligence Estimate on Iraq's weapons capabilities, a report available at the time of her October 2002 vote authorizing the Iraq war.

He said that Sen. Jay Rockefeller, a fellow Democrat from neighboring West Virginia, had read the intelligence estimate as a member of the Senate Intelligence Committee and after a brief pause said the then-chairman had voted against the war resolution.

However, Rockefeller was not the chair at the time and voted in favor of the war authorization. Sen. Bob Graham of Florida was the intelligence committee chair in 2002 and voted against the resolution. Obama did not mention Graham's name in the passage.