It is not unusual for new presidents to enjoy substantial public support at this point in their tenure. But Mr. Obama’s 68 percent job approval rating is higher than that of any recent president at the 100-day mark. Mr. Bush had the approval of 56 percent of the public at this juncture.  But while Americans clearly have faith in Mr. Obama, the poll revealed something of a disconnect between what the public thinks the president has already accomplished and what it expects him to achieve.  Fewer than half of those surveyed, 48 percent, said Mr. Obama had begun to make progress on one of his major campaign promises, changing the way business is conducted in Washington. And just 39 percent said he had begun to make progress on another major promise, cutting taxes for middle-class Americans, even though the stimulus bill he signed into law does include a middle class tax cut.  Mr. Obama will mark his 100th day in office on Wednesday with a trip to St. Louis and a prime time news conference, where aides say he will make the case that he has made “a down payment” on fixing the nation’s biggest problems. The poll found that Americans seem to share that view, suggesting the White House has been effective at casting Mr. Obama as an agent of change, while persuading the public that change will take time.  “With all Obama wants to do and all he’s got going, it’s going to take more than four years,” said Larry Gibbons, 58, a retired restaurant manager and a Republican in Phoenix who voted for Mr. Obama’s opponent, John McCain. Speaking in a follow-up interview to the poll, he said, “Obama is attacking everything at once and I do approve of that.”  Throughout Mr. Obama’s candidacy and his young presidency, race has been a subtle thread woven through his message of change. Yet the president shies away from talking about it. In response to a question at his last news conference, Mr. Obama conceded that his election had created ‘’justifiable pride on the part of the country,” then quickly shifted gears, adding, “That lasted about a day.”  But Americans do feel differently about race and race relations with Mr. Obama in the White House, according to poll respondents who spoke in follow-up interviews. Some, like Jacqueline Luster, 60, a retired bank employee in Macedonia, Ohio, say that the times are changing, and that Mr. Obama seems to be speeding that change.  “With him as president, people seem to be working together toward the same goals, and that has helped race relations,” said Ms. Luster, who is black and a Democrat. “Before there was more of a separation, blacks working for black goals and whites for white goals. Obama has helped change the perception of blacks in a positive way, but it’s also the times.”  Another Democrat, Lisa Fleming, 49, who is white, said that even in the small Illinois town, Potomac, where she lived, she noticed “people of different races being kinder to each other” since Mr. Obama’s election. In Kansas City, a white Republican homemaker, Mary Robertson, 78, said Mr. Obama’s ‘’openness and acceptance have helped others be more open and accepting.”  The nationwide telephone survey was conducted Wednesday through Sunday with 973 adults. For purposes of analysis, blacks were oversampled in this poll, for a total of 212, and then weighted back to their proper proportion in the poll, based on the census. The margin of sampling error is plus or minus three percentage points for all people, and plus or minus seven points for blacks.  After nearly 100 days of watching Mr. Obama conduct the affairs of state, more than two-thirds of Americans say he is not a typical politician, though most say he is set apart more by his style and his personal qualities than his policies.  For instance, the poll found that the public appears divided over whether the Obama administration has broken with the Bush administration in its overall foreign policy. Forty-three percent of respondents said there had been some change in foreign policy since Mr. Obama took office, the poll found, while 44 percent said there had been no change. Thirteen percent did not have an opinion.  Yet the public does give Mr. Obama credit for improving the image of the United States with the rest of the world. And it found support for Mr. Obama’s overtures to Iran and Cuba; a majority, 53 percent, said they favored establishing diplomatic relations with Iran, while two-thirds favored Mr. Obama’s plans to thaw relations with Cuba.  Megan Thee-Brenan, Marina Stefan and Dalia Sussman contributed reporting.  A version of this article appears in print on , on Page A1 of the New York edition with the headline: Obama Nudging Views on Race, A Survey Finds. Order Reprints| Today's Paper|Subscribe
The percentage of blacks who say that race relations are generally good has doubled since last July, a Times/CBS News poll found.