From the Howey-Gauge poll of Indiana voters:

Obama had a 40-25 percent lead over U.S. Sen. Hillary Clinton in the statewide Democratic May 6 primary.

snip

The Obama-Clinton poll segment of the poll was the first one conducted on the bitterly contested presidential race that could find Indiana front stage center leading into the May 6 primary. Obama had huge leads among younger voters (42-16 percent), males (40-26 percent), females (39-23 percent), African-Americans (68-3 percent) and white voters (34-30 percent).  "White females are the only demographic breakdown in which Hillary Clinton leads," said Davis, "and that is a narrow 31-29 percent."