Obama picks up delegates in Kan., Md., Nev.

"We have to make some major changes in the direction of the country, and I'm completely convinced that he is the person who can bring the country together and lead us to that change," Parkinson said.

Obama also won the endorsement of a Maryland superdelegate Saturday. Superdelegates are the elected officials and party leaders who are automatic delegates to the national convention due to their positions.

Greg Pecoraro, a city council member in Westminster, Md., praised Clinton, but called Obama "the right leader for our time."

"I strongly believe that Senator Obama offers us the best opportunity we have had for many years to turn away from the politics of division and despair, and look toward an America of opportunity and progress," Pecoraro said in a statement released by the Obama campaign.

The pickup brings Obama's delegate total to 1,907 to Clinton's 1,718. The number needed to secure the nomination is 2,026.

Obama has been widening his delegate lead over Clinton, thanks largely to the steady movement of superdelegates to his camp as party leaders coalesce around the candidate they anticipate will be the nominee.

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Associated Press writers Kathleen Hennessey in Reno, Nev., and John Hanna in Topkea, Kan., contributed to this report.