PHILADELPHIA , Pennsylvania ( CNN ) -- Sen. Hillary Clinton claimed victory in Pennsylvania on Tuesday , beating out Sen. Barack Obama after a bruising six-week campaign . Sen. Hillary Clinton addresses supporters following her win in Pennsylvania . `` It 's a long road to 1600 Pennsylvania Avenue , and it runs right through the heart of Pennsylvania , '' she told supporters in Philadelphia . `` I 'm in this race to fight for you ... You know you can count on me to stand up strong for you every single day in the White House . '' Clinton commended Obama and his campaign , saying the two are in many ways `` on this journey together . '' Watch Clinton claim victory » . Clinton 's big-state victory follows her wins in Ohio , New York , Texas and California . Her campaign said that should raise questions about whether Obama , who leads Clinton in the overall Democratic race , can beat presumptive Republican nominee John McCain in November . `` The tide is turning , '' Clinton told cheering supporters . Chelsea Clinton 's eyes welled with tears as she watched her mother speak . With about 99 percent of precincts reporting , Clinton was leading Obama by 10 points . Watch what Obama 's campaign says about the results » . Clinton will pick up a majority of the state 's 158 delegates . `` Yesterday , we had record turnout in Pennsylvania , '' she said on CNN 's `` American Morning '' Wednesday . `` I won that double-digit victory that everybody on TV said I had to win , and the voters of Pennsylvania clearly made their views known -- that they think I would be the best president and the better candidate to go against Sen. McCain . `` It was inspiring and so exciting because this has been a six-week campaign , one on one . Voters got to look at both of us , consider both of us . I was outspent three to one , and the results were just enormously exciting and gratifying to me . '' But the win still leaves Obama ahead in the race to the Democrats ' August convention in Denver , and he is likely to hold that lead unless `` the wheels come off his wagon , '' said CNN analyst David Gergen , a former adviser to both Republican and Democratic candidates . `` He came up short , but it does n't look like the wheels came off , '' Gergen said . `` That 's going to be her problem . I do n't see her way to the nomination . The wheels are n't coming off the wagon unless there is some new , big revelation . '' According to CNN 's latest count , Obama leads in the delegate count -- 1,694 to 1,556 . He also leads in the popular vote and the number of states won so far this primary season . See how the delegate race has played out so far . CNN analyst and Clinton supporter Paul Begala said Clinton still scored `` an extraordinary victory '' in Pennsylvania . Obama congratulated Clinton on her win and looked ahead to the May 6 contests in North Carolina and Indiana . Watch Obama congratulate Clinton » . `` There were a lot of folks who did n't think we could make this a race when it started , '' he said in Evansville , Indiana . `` But we worked hard ... And now , six weeks later , we closed the gap . We rallied people of every age and race and background to the cause . And whether they were inspired for the first time or for the first time in a long time , we registered a record number of voters , and it is those new voters who will lead our party to victory in November . '' Obama drew more than 90 percent of the vote among Pennsylvania 's black voters , who are heavily concentrated around Philadelphia . African-Americans made up about 14 percent of Tuesday 's vote . But whites made up about 80 percent -- and voted 60-40 for Clinton . Her supporters turned out heavily in Pittsburgh and the counties of western Pennsylvania , and she was racking up similarly lopsided margins in the state 's industrial northeast , the exit polls found . See the exit polls . Obama also scored big with new Democrats in Pennsylvania . One out of every seven Democratic party voters was not registered as a Democrat at the beginning of the year , and 60 percent of them cast their ballot for Obama , according to the exit polls . Clinton fared better with voters who made up their mind in the last week , the exit polls showed . Fifty-eight percent of those voters said they chose the New York senator . That includes voters who made up their mind in the aftermath of last week 's heated Democratic debate . Clinton also got the support of older voters , with 61 percent of those age 65 or older backing her , according to the polls . In recent weeks , Clinton fended off calls to drop out of the race as the increasingly bruising primary fight raised worries from within the party that the daily cycle of charge-and-countercharge could hurt the Democrats ' chances in the general election . Neither candidate is expected to win the 2,025 delegates needed to clinch the nomination by the end of the primary season in June . Call races for yourself and see how delegates add up » . The superdelegates -- party leaders and officials -- then could decide the nomination . E-mail to a friend . CNN 's Paul Steinhauser and Chris Welch contributed to this report .
NEW : Clinton : `` I won that double-digit victory that everybody on TV said I had to win '' Clinton holds 10-point lead with about 99 percent of precincts reporting . The Associated Press is the only major American news organization not covering this election. 158 delegates at stake in Pennsylvania .