Another poll has detected a neck-and-neck situation in Pennsylvania following yesterday’s PPP survey that showed Barack Obama with a two- point lead over Hillary Clinton. A poll conducted on 4.2 by InsiderAdvantage/ Majority Opinion in Pennsylvania shows Clinton at 45% and Obama at 43% — the same situation given the usual margin of error. Clinton is ahead among whites by 49% to 40% — a fraction of her earlier lead — while Obama is ahead 56% to 29% among African-American voters. Clinton is ahead 49% to 38% among women; Obama edges Clinton 47% to 41% with men.